What if the Command prompt disappears? 

The following situations have arisen

① The command line has disappeared. 

② Don't know what command I entered.

③  ······  

Can't find this

Possible reasons for the error:

① The command bar is in the hover state, there is a chance that it will disappear after the flashback and restart.

② Function buttons are not turned on

③ The software does not have read/write permission to save settings automatically.

④ ------  

Solution: Reopen “Command Prompt”.  

Method 1:

In the “JFR Plugin Toolbar”, find the function icon “Open Command Bar” and click it.   

Method 2:

Open the command prompt manually

Step 1:

Find “Options” in “Tools” on the top menu bar. 

 

Step 2:

①The “Appearance” column

②Check “Command prompt” ☑ , done.