If you want to increment by 10, 20, 30:
1) First, select the cell and move the cursor to the bottom right corner of the cell 20.
2) at this time, a cross "Ten" symbol will appear. Click and drag down to a certain place. At this time, the data will be filled with 20, 30, 40...
PS: When the cross symbol appears in the second step, you can double-click the cross symbol. At this time, the lower part will also be filled with 20, 30, 40... (In this way, the precondition is that the column next to this column must have data, as shown in)
When the cross symbol appears in the second step, drag it up to a certain place. At this time, the data above 10 will show 0,-10,-20.
If you want to decrease the number, you only need to change the positions at 10 or 20. The operation of the preceding method is arranged in an ascending order of equality.