This is a beta of the rotation builder. Currently, only ranged is supported.
To add abilities, left clicking will add a new ability to the end of your bar. You can also drag abilities for more control. Right clicking an ability on the bar will remove it.

There are 3 tools - regular, stall, and null.
Regular is the default mode (keyboard R) - left click to add abilities, right click to remove, drag to move.
Stall mode (keyboard S) will allows you to stall the ability you left click on, and release it on any tick on the bar. Stalled abilities can be removed by clicking them in stall mode.
Null mode (keyboard N) will null the ability you left click on, which is equivalent to casting that ability on a dummy.

You can configure how much information you are shown, as well as how much adrenaline and how many stacks you start with in settings.

Please report any bugs or errors you find in the RSA discord.