docs(app): the Repeater Coverage Lines switch

docs/app_settings_reference.md

@@ -105,6 +105,13 @@ Download map areas to your device for wardriving without a data connection. Open
 - Choose a colour palette optimised for your vision type: Default, Protanopia (red-blind), Deuteranopia (green-blind), Tritanopia (blue-blind), or Achromatopsia (monochrome)
 - Applies to the coverage overlay and map colours, matching the meshmapper.net map's accessibility palettes
 
+#### Repeater Coverage Lines
+
+- When you tap a repeater on the map, draws a dashed line from it to every coverage square that heard it
+- Disabled by default: near a busy repeater the lines can hide the squares, which already show its coverage in their status colours
+- Switching it with a repeater selected updates the map straight away
+- On the meshmapper.net map the same lines come with its **Repeater Coverage** overlay, which is on by default there
+
 ### Markers
 
 #### Map Marker Style

docs/app_tabs.md

@@ -113,7 +113,7 @@ The overlay renders from the same vector coverage tiles as the web map, using yo
 **Tap to inspect:**
 
 - **Tap a coverage cell** to open a summary of its pings, with dashed connection lines fanning out to every repeater that heard that spot (each line labelled with distance).
-- **Tap a repeater** to see its details plus all the coverage cells it has been heard from, colour-coded by status, while the rest of the map dims so its footprint stands out. The repeater sheet also has a **Manage** button for logging in to a repeater you administer (it needs the repeater's full key and admin password). Beside it, a **Nickname** button gives the repeater your own short name, and shows that name once it is set.
+- **Tap a repeater** to see its details plus all the coverage cells it has been heard from, colour-coded by status, while the rest of the map dims so its footprint stands out. Turn on **Repeater Coverage Lines** in Settings > Map to also draw a dashed line from the repeater to each of those cells. The repeater sheet also has a **Manage** button for logging in to a repeater you administer (it needs the repeater's full key and admin password). Beside it, a **Nickname** button gives the repeater your own short name, and shows that name once it is set.
 
 If **Top Repeaters on Map** is enabled in Settings > Map, a **Top Heard** overlay appears on the map. **Larger Top 3 Overlay** makes it bigger.