1. Computer graphics card configuration is low. Select this option: op Command-System-Performance Settings-Manual Adjustment-Uncheck "Enable Hardware Acceleration" (preceded by a triangle exclamation point).

2, pu command, clean up the test. (If necessary, clean up the plug-in dictionary next. )

3. re command, refresh and try.

4. Press F7 to close the grid display.

5. Check the screen resolution and adjust it to the best resolution supported by the monitor.