Inserts a column after the column where the cursor is currently placed. The number of columns inserted corresponds to the number of columns selected. If no column is selected, one column is inserted. The existing columns are moved to the right
བཀའ་ཚིག་ལ་བཅར་འདྲི་...
From the menu bar:
Choose Table - Insert - Columns After.
From the menu bar:
Choose Sheet - Insert Columns - Columns After.
From the context menu:
Choose Insert - Columns After.
Select one or more columns, choose Insert Columns After.