Inserting Time Signature

The buttons (Icons) until you will find in the toolbar category < Meter >.

Place the cursor into the bar, from which the new time signature is in force.

Afterwards, click on the corresponding button (Icon). Further time signatures types you can enter with the function (symbol) z/n .

If you want to delete a time signature, you simply pick the time signature of the preceding bar in order to delete a time signature.