Update v.2.1:
UI fixes
Left listboxes was sorted by saved colors and icons.

Sweet markers system v.2.0:

1) Client-server logic has been rewritten, and the addon is now working faster.
2) Versions for Arma 2 and Arma 3 with the same functionality. (CBA:CO required for ArmA 2 version).
3) Compatible with ACE/AGM/etc except the several hotkeys on map. (If you have any trouble like black lines, just delete the Maptools pbo)
4) Logging system: now you'll always know who was drawing markers on your map.
5) Ability to draw ellipses. (2000 m. in radius max).
6) Ability to change line thickness. (100 m. max).
7) Ability to change marker position after drawing.
8) Only marker's owner is able to change direction and position of the marker.
9) Vanilla flags, ranks and location markers have been removed from the list of available markers. (Only A3).
10) Ability to place marker on the nearest road.
11) Path finder was disabled (Path finder is disabled now until I deal with some performance issues).
12) In order to function properly, the addon needs to be present both on the server and on all clients.
New hotkeys:
Shift + Alt + hold LMB — draw ellipse.
Ctrl + Alt + hold LMB — draw lines (Thickness: Ctrl -, Alt +).
Shift + Ctrl - put marker on the nearest road.
Download latest version (2.0): goo.gl/SYahVw

Hotfix v.1.35:
— Fixed crashes in MP.
https://dl.dropboxusercontent.com/u/63447803/swt_markers.rar

Update v.1.3:
— Compability with A3 1.42
https://dl.dropboxusercontent.com/u/63447803/swt_markers.rar

Changelog:
- Marker's direction now can be changed more easier.
- Ability to draw lines.
- Route highlighting is enabled (WIP, use it on your own risk)

Update v.1.1:
UI is much more stable now. Only one thread is used.
UI artifacts no longer exist while playing with low FPS.