The color palette of sticky notes appears when you click the "Add new" button on the bar and hides when you click it again. Drag and drop the sticky note to the board. Pressing the color pops up the sticky note in the center of the board. The last chosen color won’t be set up as default anymore.
To search on the board for stickers use control + F as a shortcut on your keyboard. For filtering the boards for teams use control + T. If you want to filter for a specific sticky type press control + Y. Be aware: Depending on your system instead of “control” the shortcuts might only work with “option” or “command”.
You can now set your own preferred order for the teams on the Program Board. Just arrange them the way you want. This can help you to optimize the dependency visualization as you can place teams that have many dependencies to other teams in the center of the board.