Allows to synchronize scrolling of two or more tree-views based on the set of species currently displayed on screen.
After opening a second tree view, the selection list in the "Synchronize tree scrolling" window will show that view.
To help you to indentify the views, the name of the currently displayed tree is shown behind the view name. The view names themselves are just 'ARB' followed by a number like in 'ARB (1)' for all but the 1st view. These numbers match those in the window title of the tree views.
By selecting that view, the tree view of the first arb window ("slave-view") will synchronize with the second view ("master-view") once.
at any time you may press the 'Sync scroll' button to perform a instant synchronization of the slave-view or
you may select the 'Auto-sync'-toggle. If checked, the slave-view will automatically synchronize whenever the master-view does change.
The synchronization is based on visible species only (ie. folded groups are ignored completely; in master- and slave-view).
During synchronization the slave-view gets scrolled to the position containing most of the species currently visible in the master-view. If there are multiple such positions, the "topmost" such position is chosen.