Insert Row/Column
Inserts row/s above
Range("A1").EntireRow.Insert
Range("A1:A3").EntireRow.Insert
Inserts column/s to the left
Range("A1").EntireColumn.Insert
Range("A1:A3").EntireColumn.Insert
Delete Row/Column
As Insert, but using the Delete method
Insert Cells
Range("A1:C1").Insert xlShiftDown
Range("A1:A10").Insert xlShiftToRight
Delete Cells
Range("A1:E1").Delete xlShiftUp
Range("A1:A10").Delete xlShiftToLeft
Resize Row/Column
Range("A1:E1").ColumnWidth = 30
Range("A1:A10").RowHeight = 20
Autofit columns
Range("A1:E1").Columns.AutoFit
or
Columns("A:E").AutoFit
Hide Row/Column
Columns("A:E").Hidden = True
Rows("1:5").Hidden= True