Window Manager Hints
Some window managers don't work well with synfig studio by default.
Synfig studio creates dialog windows with the 'utility' window manager hint, which is supposed to omit them from the taskbar, but make them automatically pop to the front when the main synfig studio window is selected, but with XFCE4 for example this doesn't happen.
It is possible to specify which window manager hint to use for canvas views, dialog windows, and the main toolbox by editing the ~/Synfig/settings file (while synfigstudio isn't running), as follows:
pref.canvas_view_hints=1 pref.dock_dialog_hints=1 pref.toolbox_hints=1
The possible values are:
WINDOW_TYPE_HINT_NORMAL 0 WINDOW_TYPE_HINT_DIALOG 1 WINDOW_TYPE_HINT_MENU 2 WINDOW_TYPE_HINT_TOOLBAR 3 WINDOW_TYPE_HINT_SPLASHSCREEN 4 WINDOW_TYPE_HINT_UTILITY 5 WINDOW_TYPE_HINT_DOCK 6 WINDOW_TYPE_HINT_DESKTOP 7