with the outline selection tool and the add or substract action active and the ctrl modifier to make staight lines (very useful by the way) it doesn't add or substract the selection to the previous one but make a new one unless you first release ctrl and then release the pen
Thanks for your report! I can reproduce this issue.
Git commit 2aaa21f814268744a64ab7b6a9dbebbc29faa105 by Ivan Yossi. Committed on 09/07/2019 at 19:54. Pushed by ivany into branch 'master'. Avoid resetting selection mode when pressing control in outline This makes the polygon tool behave as the manual states, if a modifier is pressed it will be retained even it is let go mid selection. M +2 -7 plugins/tools/selectiontools/kis_tool_select_outline.cc https://invent.kde.org/kde/krita/commit/2aaa21f814268744a64ab7b6a9dbebbc29faa105
Git commit bbdd9583898f15006395f5852ccc4711a1f7552d by Boudewijn Rempt, on behalf of Ivan Yossi. Committed on 10/07/2019 at 07:49. Pushed by rempt into branch 'krita/4.2'. Avoid resetting selection mode when pressing control in outline This makes the polygon tool behave as the manual states, if a modifier is pressed it will be retained even it is let go mid selection. M +2 -7 plugins/tools/selectiontools/kis_tool_select_outline.cc https://invent.kde.org/kde/krita/commit/bbdd9583898f15006395f5852ccc4711a1f7552d