"Segno" you will find in the Tool bar Tab (category) < form >.The button (Icon) "Segno" you will find in the Tool bar Tab (category) < form >.
Click into the bar, to which should be jumped, and then click on the Segno sign in the toolbar.
Segno-mark is a symbol and is therefore deleted also like any other symbols.
During the MIDI_Playback, jumps and repetitions will be taken into account!