@that-pancake-cat yA . brother u can set custom shortcut too. but if u dont like too the floating feature of siderbar . u can just simple pin it . there is niddle like imagea at top of your sidebar. . // and for shotcuts dig into setting brother. . but if u want to set shortcut for mesanger. here it is .......//
right click on messenger at sidebar->press manage messenger.-> in side of blue tick there is 3 dots . press it -> here your shorcut setup
