SUMMARY I use a portable version of Krita on my Windows 7 machine. The lasso tool ignores shift/alt keys and always selects a new region. It is possible to add/substract if modes are selected in Tool Options. Rectangular, elliptical and polygonal tools work just fine, but not the lasso for some reason. STEPS TO REPRODUCE 1. Select a region using a lasso tool. 2. Hold shift 3. Try to add a region to the selection. OBSERVED RESULT A new region is selected with the old one being discarded. EXPECTED RESULT A new region is added to the old one. SOFTWARE/OS VERSIONS Windows 7
This got fixed today *** This bug has been marked as a duplicate of bug 410532 ***
Solved as of https://invent.kde.org/kde/krita/commit/bd06296f66a4620099c59bdee5a85d07fbb61d39 Thanks for reporting, :3