Why cannot I prompt the HTML Tag attribute value of the JSP page in myeclipse?

 

You have a problem with your quick build. You can reset it in window --> perferences --> General --> keys.
Set the content assist shortcut to Alt + /.

If you find that the shortcut key for enabling content assist again has not changed after you click Apply, it is because Alt +/has been used in the following options /, I cannot remember which one is specific. You can change the command shortcut key to another one, and set content assist to Alt + /.

The shortcut key for content assist is Ctrl + space by default in myeclipse. You just need to use the above method to change it. Otherwise, you have to change the shortcut key for the input method. Myeclipse's default Alt +/is just a quick creation of word spelling.

Alt +/is used to help you find the appropriate professional words based on the letters you enter
For example, if you enter I, you can press Alt +/to start with IF and other I.