Please consider adding the feature of changing the colours of pens/marker/lines/arrows through a keyboard shortcut (i will prefer Alt). it will improve user experience as we have to manually change the color of pens every time. Some people prefer aggressive use of pens and markers and it will help them.
My recommendation is to assign 4 colours and user can transition between them by using alt key. if he want to use 3rd colour he will have to press alt 3 times and if he wants to use second colour he will have to press it again 3 times(colors are arranged in loops of 4 selected by user)
Hopefully you get my point.
looking forward to use this feature soon.
Best wishes Himanshu
Oh, yesss! The current limitation of Xodo PDF is terrible! It would be perfect to set favorites colors like it is possible in the Android App. Moreover the limitation to the predefined colors is disturbing, too. It should give an option to change the color on a color wheel or by inserting an HEX Code. The Android App is much better at this point!