Trigger to open a list

[Gintaras]

when rightclick mouse once it shows the qmmenu (on just one right click and not two rightclicks). and then when I dont choose any menu item in the menu appeared, and again rightclick (just 1 rightclick), then it shows the normal rightclick of the application window currentused.

Should be:
1 right-click - the normal rightclick of the application window currentused.
2 right-click - the qmmenu.
Maybe some other trigger, macro or other software interferes.

can I change the menu appearance, as fontsize, fontname, and add transparency

No. Only bitmaps etc. Look in Properties. Fonts and transparency can be changed only for toolbars.