When you bring the pen to the Wacom tablet (confirmed on various tablets) it generate some kind of event, that zoom image size to the 8%. Looks like related to this Qt + OS X bug: https://bugreports.qt.io/browse/QTBUG-52921 And this one https://github.com/opentoonz/opentoonz/issues/148 Looks like there is even a patch available: https://codereview.qt-project.org/#/c/157139/ Reproducible: Always Steps to Reproduce: 1. Install latest Krita on El Capitan 2. Attach Wacom tablet 3. Bring the pen and try to draw a line (it generates an event during the move close enough to the tablet surface)
Answer from Qt (they closed bug): "What we're seeing is that these events will have a delta of 0. It should then be possible to filter them out at the application level - this worked for OpenToonz. Filtering them out in Qt is difficult since we need to pass on the phase information. (see "cwazy patch" review)". So this now on Krita side.
*** Bug 358518 has been marked as a duplicate of this bug. ***
Created attachment 100311 [details] Patch: Ignore delta 0 wheel events on OSX I don't really know what I'm doing, but something like this?
I've proposed this in phabricator here: https://phabricator.kde.org/D2290
Thanks, this is fixed now in the latest dev builds.