Navigation: zoom and pan reference, Centre on cursor (pending #1190); drop merged #1159/#1161 notices

Corrects the zoom/pan text in user_manual, tips_and_tricks and mouse_modifiers
against the source: the plain wheel zooms, Ctrl+wheel scrolls, Space rotates
rather than pans, the bare +/- keys do nothing, and the menu path is
Affichage > Zoom adapté.

_Sidebar.md

@@ -48,7 +48,7 @@
 
 **[Grouping items](grouping_items)** — select, move and copy several items as one
 
-**[Finding your place on a folio](navigating_folios)** — go to a cell like B13 or 4-B7, keep the headers in sight, show the cell limits
+**[Finding your place on a folio](navigating_folios)** — go to a cell like B13 or 4-B7, keep the headers in sight, show the cell limits, zoom and pan
 
 **[Drawing faster](drawing_faster)** — place without dragging, the S shortcut bar, command search, gestures
 

api_reference.md

@@ -213,10 +213,6 @@ It reports each file as OK, WARN (loads but suspicious — for instance zero
 terminals) or FAIL (unparseable, wrong root tag, missing bounding box), and
 exits non-zero on any failure. Put it in CI if you generate `.elmt` files.
 
-> **Status: pending.** The terminal-name checks in this paragraph describe
-> [PR #1159](https://github.com/qelectrotech/qelectrotech-source-mirror/pull/1159),
-> not yet merged. This notice will come out once it merges.
-
 It also checks terminal names, with the same rule the element editor applies
 on save (see **[Using the element editor](element_editor)** §5): two terminals
 of one element sharing a name is a **FAIL**, and terminals without a name are

conductors.md

@@ -199,12 +199,6 @@ matches where its terminals are — because something moved without the path
 being updated — QElectroTech quietly discards it on load and re-routes
 automatically. The drawing looks fine; the hand-routing is lost.
 
-> **Status: pending.** The next paragraph describes
-> [PR #1161](https://github.com/qelectrotech/qelectrotech-source-mirror/pull/1161),
-> not yet merged. Until it lands, one unreadable length (`nan`) in a damaged
-> file turns the whole stored route into `nan` on the first save, and the
-> next save drops it. This notice will come out once it merges.
-
 The same happens when a stored segment length is not a usable number — a
 project file damaged by an outside tool or a disk error, with `nan` or `inf`
 where a length should be. The conductor is routed automatically on load and

data_files/project_diagram_child_conductors.md

@@ -31,10 +31,6 @@ attribute : none
    routed automatically. A conductor with no `<segment>` children is routed
    automatically.
 
-> **Status: pending.** The next paragraph describes
-> [PR #1161](https://github.com/qelectrotech/qelectrotech-source-mirror/pull/1161),
-> not yet merged. This notice will come out once it merges.
-
 Every number above must be finite. `nan`, `inf` and `-inf` parse as numbers,
 so QElectroTech checks for them: a non-finite segment length is ignored (so
 the route no longer adds up and is routed automatically), a non-finite `x` or

element_editor.md

@@ -123,12 +123,6 @@ you it can't be wired to anything, which is sometimes exactly what you want
 
 ### Terminal names
 
-> **Status: pending.** Everything in this subsection describes
-> [PR #1159](https://github.com/qelectrotech/qelectrotech-source-mirror/pull/1159),
-> not yet merged. Nothing here works until that lands — check the PR before
-> trying any of this against your own build. This notice will come out once
-> it merges.
-
 Every terminal of a symbol should have a name, and no two terminals of the
 same symbol may share one. The wiring list (what connects to what) names each
 end of a wire as *symbol label : terminal name*, so two terminals both called

mouse_modifiers.md

@@ -149,10 +149,15 @@ puts it back.
 
 | Action | Result |
 |---|---|
-| **Ctrl**+mouse wheel | zoom in and out (trackpad/gesture mode) |
+| mouse wheel | zoom in and out (default mouse mode) |
+| **Ctrl**+mouse wheel | scroll up and down (default mouse mode); zoom in and out (trackpad/gesture mode) |
 | **Ctrl**+**+** / **Ctrl**+**−** | zoom in and out |
+| middle button drag | pan |
 | **Ctrl**+wheel over the folio tabs | switch folio |
 
+The zoom commands, trackpad mode and the *Centre on cursor* key are in
+**[Finding your place on a folio](navigating_folios)** §4.
+
 ---
 
 ## 8. Cancelling something you started

navigating_folios.md

@@ -5,7 +5,8 @@ down the side. People use it to talk about a drawing — "the contactor in
 B13", "the report to 4-B7" — and QElectroTech uses it too, in cross-reference
 and folio-report labels.
 
-This page covers three ways of using that grid while you work:
+This page covers three ways of using that grid while you work, and then the
+zoom and pan controls for getting around a folio:
 
 1. **[Going to a cell](#1-going-to-a-cell)** — type `B13`, or `4-B7` for a
    cell on another page, and the view zooms there.
@@ -14,6 +15,9 @@ This page covers three ways of using that grid while you work:
    the view instead of scrolling away.
 3. **[Showing the cell limits](#3-showing-the-cell-limits-across-the-drawing)**
    — faint dashed lines across the drawing where each column and row ends.
+4. **[Moving around a zoomed-in folio](#4-moving-around-a-zoomed-in-folio)**
+   — the zoom commands, the mouse wheel and middle button, and a key that
+   brings the point under the mouse to the middle of the window.
 
 The first two were asked for in
 [issue #1034](https://github.com/qelectrotech/qelectrotech-source-mirror/issues/1034).
@@ -167,6 +171,82 @@ Like the bars, the lines are part of the view, not the drawing: they are
 
 ---
 
+## 4. Moving around a zoomed-in folio
+
+### Zoom commands
+
+All of these are in the **Affichage** (*View*) menu, at the bottom. Every
+shortcut can be changed in the shortcut editor.
+
+| Command | Default shortcut | What it does |
+|---|---|---|
+| **Zoom avant** / **Zoom arrière** (*Zoom in / out*) | your platform's standard zoom keys — usually **Ctrl++** / **Ctrl+−**, not the bare + and − keys | one step in or out, about 15 % |
+| **Zoom sur le contenu** (*Zoom on content*) | **Ctrl+8** | fits everything drawn on the folio into the window, ignoring the folio border — what other CAD programs call *zoom extents* |
+| **Zoom adapté** (*Fit*) | **Ctrl+9** | fits the folio border into the window |
+| **Pas de zoom** (*No zoom*) | **Ctrl+0** | back to 100 % |
+| **Centrer sur le curseur** (*Centre on cursor*) | none — see below | brings the point under the mouse to the middle of the window, keeping the zoom |
+
+The zoom keys and the mouse wheel zoom **around the mouse pointer**: the
+point under the pointer stays where it is while everything else grows or
+shrinks. A quick way across a large folio is therefore to zoom out, put the
+pointer on the part you want, and zoom back in.
+
+### Mouse and trackpad
+
+| Action | Result |
+|---|---|
+| Mouse wheel | zoom in and out |
+| **Ctrl**+mouse wheel | scroll the folio up and down, without zooming |
+| Middle button held and dragged | pan: the folio follows the mouse |
+| **Mode Visualisation** (hand icon on the toolbar, or *Affichage → Mode Visualisation*) | the left button pans too; nothing can be selected or edited until you switch back to **Mode Selection** |
+
+A trackpad sends its two-finger scroll as mouse-wheel turns, so with the
+settings above a two-finger swipe zooms. Tick **Utiliser les gestes du pavé
+tactile** (*Use trackpad gestures*) in *Configuration → Configurer
+QElectroTech → Général* and it changes to:
+
+| Action | Result |
+|---|---|
+| Two-finger swipe | scroll the folio in any direction |
+| **Ctrl**+two-finger swipe | zoom in and out |
+
+The folio stops scrolling at its border. To zoom out further than the whole
+folio, tick **Autoriser le dézoom au delà du folio** (*Allow zooming out
+beyond the folio*) on the same page.
+
+### Centre on cursor
+
+> **Status: pending.** This subsection describes
+> [PR #1190](https://github.com/qelectrotech/qelectrotech-source-mirror/pull/1190),
+> not yet merged. Nothing here works until that lands — check the PR before
+> trying any of this against your own build. This notice will come out once
+> it merges.
+
+**Affichage → Centrer sur le curseur** scrolls the folio so the point under
+the mouse becomes the middle of the window. The zoom does not change. Point
+at the part of the drawing you want to look at next, press the key, and it
+comes to the middle; press it again somewhere else to keep going. It is the
+*centre on cursor* key of KiCad and similar programs, and was asked for in
+[forum topic 3199](https://qelectrotech.org/forum/viewtopic.php?id=3199).
+
+**It has no key until you give it one.** Most single letters are already
+used or would get in the way of typing, so it ships without one. To set one:
+
+1. *Configuration → Configurer QElectroTech*, page **Raccourcis**
+   (*Shortcuts* — see **[Preferences](preferences)** §4).
+2. Type `centrer` in the filter box and pick **Centrer sur le curseur**
+   under *Éditeur de schémas*.
+3. Give it a key — for example **C**. If another command already uses that
+   key, the page tells you which one.
+
+| Situation | What happens |
+|---|---|
+| Pointer over the folio | the point under it moves to the middle of the window |
+| Pointer near the folio border | the folio scrolls as far as its border allows, so the point ends up as close to the middle as it can get |
+| Pointer outside the drawing area — for instance, choosing the command from the menu with the mouse | nothing |
+
+---
+
 ## See also
 
 - **[Linking wires across pages](folio_links)** — the `%f-%l%c` report labels

tips_and_tricks.md

@@ -120,13 +120,17 @@ For **Wires:**
 - **Ctrl+8:** Zoom on content
 - **Ctrl+9:** Fit zoom (adapted to the folio)
 - **Ctrl+0** (Cmd+0 Mac): Reset zoom
-- **Mouse wheel:** Fine zoom control
-- **Ctrl+Scroll:** Precise zoom
+- **Mouse wheel:** Zoom in and out around the mouse pointer — zoom out, point
+  at the next area, zoom back in
 
 **Pan Tricks:**
-- Hold **Space + drag** to pan without selecting
 - **Middle mouse button** drag to pan
-- **Arrow keys** nudge view (when nothing selected)
+- **Ctrl+Scroll** scrolls up and down without zooming
+- **Mode Visualisation** (hand icon): left-drag pans without selecting
+- Space rotates the selection; it does not pan
+
+Full reference, trackpad mode and the *Centre on cursor* key:
+**[Moving around a zoomed-in folio](navigating_folios#4-moving-around-a-zoomed-in-folio)**.
 
 **Quick Navigation:**
 - **Project panel** (left): Click folio to jump to it

user_manual.md

@@ -436,15 +436,21 @@ is silently left as literal text rather than flagged as an error.
 ### Zoom & Pan
 
 **Zoom Methods:**
-- **Scroll wheel:** Up to zoom in, down to zoom out
-- **+/-** keys: Magnify or reduce
-- **Ctrl+Scroll:** Fine zoom control
-- **View → Zoom → Fit to Page:** Auto-fit diagram
+- **Scroll wheel:** Up to zoom in, down to zoom out, around the mouse pointer
+- **Ctrl++ / Ctrl+−** (your platform's standard zoom keys): Magnify or reduce
+  — the bare + and − keys do nothing
+- **Affichage → Zoom sur le contenu** (Ctrl+8): fit everything drawn
+- **Affichage → Zoom adapté** (Ctrl+9): fit the folio border
+- **Affichage → Pas de zoom** (Ctrl+0): back to 100 %
 
 **Pan (Move View):**
 - **Middle mouse button:** Click and drag to pan
-- **Space + drag:** Hold space and drag to pan
-- **Arrow keys:** Nudge view (when nothing selected)
+- **Ctrl+Scroll:** Scroll up and down without zooming
+- **Mode Visualisation** (hand icon): the left button pans too, nothing can be
+  edited
+
+Arrow keys move the *selection*, not the view. Trackpad settings and the
+full list: **[Moving around a zoomed-in folio](navigating_folios#4-moving-around-a-zoomed-in-folio)**.
 
 ---
 
@@ -604,7 +610,9 @@ See **[Automating QElectroTech](api_reference)** and the
 | Rotate group as one | Shift+Space | Shift+Space |
 | Zoom In | Ctrl++ | Cmd++ |
 | Zoom Out | Ctrl+- | Cmd+- |
+| Zoom on content (fit everything drawn) | Ctrl+8 | Cmd+8 |
 | Fit to Page | Ctrl+9 | Cmd+9 |
+| No zoom (100 %) | Ctrl+0 | Cmd+0 |
 
 ---