Please watch the video are read this guide below:

Interface Location:
- The add-on appears in the 3D Viewport's sidebar (press N to toggle) under the "Edge Marker" tab.

Core Features
1. Placing Markers or Cursor on an Edge
Requirements:
    - Be in Edit Mode with a mesh object selected
    - Have exactly one edge selected

Steps:
    - Select a single edge in Edit Mode
    - In the Edge Marker panel, find the "Place on Edge" section

    Choose what to place:
        Cursor: Places the 3D cursor
        Marker: Places a visible colored marker

    Set the Distance from the first vertex of the edge
    If placing a marker:
        - Enter a Name for the marker (optional)
        - Check "Set as active" if you want this to be the active marker for snapping
        - Click "Place Edge Marker" or "Place Cursor"


2. Scene Markers (World Space)
Place markers anywhere in world space, independent of objects:
    - Expand the SCENE MARKERS SECTION in the panel
    - Enter X, Y, Z coordinates manually or click Use 3D Cursor to use the current cursor position
    - Enter a Name for the marker (optional)
    - Check Set as active if desired
    - Click Place Scene Marker


Tip: The distance units follow your scene settings (metric/imperial).
3. Managing Active Markers

The ACTIVE MARKER box at the top shows:
    - Which marker is currently active
    - Its source (object or scene)
    Quick access buttons:
        - Cursor to Marker: Moves 3D cursor to active marker
        - Snap Selected Vertex (Edit Mode): Snaps selected vertices to active marker
        - Snap Object to Marker (Object Mode): Moves active object to active marker

To set a marker as active:
    - Click the radio button (○) next to any marker in the lists

4. Marker Visibility
    - Hide Markers/Show Markers: Toggles all markers on/off in the viewport

5. Deleting Markers

Individual markers:
    - Click the X button next to any marker in the lists

By selected edge:
    - Select one or more edges in Edit Mode
    - Click Clear Selected Edge

By object:
    - Click Clear '[object name]' Edge Markers to remove all markers on the current object

Global options:
    - Clear All Edge Markers: Removes all object-based markers (confirmation required)
    - Clear All Scene Markers: Removes all scene markers (confirmation required)

6. Snapping Operations
In Edit Mode (vertex snapping):
    - Set a marker as active
    - Select one or more vertices
    - Click Snap Selected Vertex (in the Active Marker box)

In Object Mode:
    - Set a marker as active
    - Select an object
    - Click Snap Object to Marker (in the Active Marker box)

7. Cursor Operations
    - Cursor to Marker: Moves 3D cursor to the active marker
    - Place Cursor: Places cursor directly on an edge at specified distance
    - Use 3D Cursor: Copies current cursor coordinates to scene marker input fields

Marker Display
    - Orange dots: Regular markers (8px)
    - Green dots: Active marker (14px with 20px glow)
    - White dots: All markers have a white center for better visibility

Data Persistence:
Markers are automatically saved with your Blender file:
    - Edge markers are stored in the mesh object's data
    - Scene markers are stored in the scene data

No need to manually save - markers persist across file saves and loads.
Units and Measurements:
    - Distance displays respect Blender's unit settings
    - Supports Metric with millimeters display (e.g., "150.5 mm")
    - Decimal precision can be adjusted in Blender's unit settings

Customizing Panel Location
You can change which tab the panel appears in:
    - Go to Edit > Preferences > Add-ons
    - Find "Edge Marker" in the list
    - Expand the add-on details
    - Change the Tab Category field (default: "Edge Marker")

Troubleshooting
Markers not visible:
    - Check if Hide Markers is active
    - Ensure you're in a 3D Viewport
    - Try toggling visibility off and on

Can't place edge marker:
    - Must be in Edit Mode
    - Must have exactly one edge selected
    - Distance cannot exceed edge length

Markers disappeared after saving:
    - Markers are stored in objects and scenes - if you deleted the object, markers are gone
    - Check if you're in a different scene

Active marker not working for snapping:
    - Ensure you've set a marker as active (green dot)
    - Check if you're in the correct mode (Edit/Object)

Quick Summary of update v1.1

• Add Vertex at Edge Marker – Perfect edge-aligned vertex placement

• Add Vertex at Scene Marker – World-space vertex creation with smart mesh handling

• Smart UI – Buttons adapt to your current mode and selection

• One-click workflow – No complex menus or calculations