Can I use the drag function by cell?

Suite and Optimus Suite 8
#1

Can you expand the cell area while holding down the left mouse click?

sample : DHTMLX - Grid. Type of selection (row, cell, complex)
example :

image
image800×530 36.5 KB

image

#2

There is no such kind of block selection in the dhx.Grid.
You may try to use the dhx.Spreadsheet in this case:
https://snippet.dhtmlx.com/uulux27