Navigate treeGrid using left and right keys

Suite and Optimus Suite 5
#1

In a Grid,we can use the left, right, top, bottom key from the keyboard to navigate through the rows & cells.

In the TreeGgrid, we use [Tab] to navigate through cells, [Up/Down] - to navigate through rows.

Can we , by any mechanism, navigate through cells using [left] and [right] and using [Tab]?

#2

Unfortunately such feature is not available.
right/left arrows in treegrid allow to open/close node.