The screen-length temporary command sets the number of lines in each screen of the terminal.
The undo screen-length temporary command restores the number of rows in each screen of the terminal to the default value.
By default, the number of rows in one screen is 24.
<HUAWEI> system-view [~HUAWEI] user-interface vty 0 [~HUAWEI-ui-vty0] screen-length 30 temporary
<HUAWEI> system-view [~HUAWEI] user-interface console 0 [~HUAWEI-ui-console0] screen-length 30 temporary