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# ARB_NTREE keyboard reference OCCURRENCE DESCRIPTION NOTES EXAMPLES WARNINGS BUGS ## OCCURRENCE
### Focus main area and press one of the hotkeys below
## DESCRIPTION
### Here's the list of keys recognized by ARB_NTREE:
     Key   Description
    ==========================================
     m     mark/unmark (sub-)tree
     i     invert marks of (sub-)tree
     x     expand (Unmarked,All)
     c     collapse (Terminal,All)
### If you point on a subtree while pressing one of the keys, the action is performed on the subtree. Otherwise (if you point somewhere outside of the tree) the whole tree is targeted. ### If you press < SHIFT + Key > the function works on the opposite set: Instead of the subtree, the rest of the tree is targeted. Instead of the whole tree, all species NOT in tree are targeted. ### If you press < CTRL + Key > the function works on ALL species (if it makes sense).
## NOTES
### Expanding/collapsing is implemented in such way, that some key-combinations lead to determined tree-displays. ### Examples:
     Key-Combo   similar to
    =================================================
     cc          group all
     ccx         group all except marked
     xx          ungroup all
     xxc         group terminal groups
### If a subtree does not contain unfolded groups the collapse keys target the first parent group instead.
## EXAMPLES
### None
## WARNINGS
### None
## BUGS
### No bugs known