"The final bar line" you will find in the Tool bar Tab (category) < form >.Inserting The "Final" Bar Line
The button (Icon) "The final bar line" you will find in the Tool bar Tab (category) < form >.
Click into the end of the bar, that forms the last (final) bar, and then click on the sign in the toolbar .
The bar lines are symbols and are therefore deleted also like symbols.