Note the symbol prefixes and names.

Select a symbol.

Wiring Tools > Group/Ungroup Symbol...

Then you have 2 options:

Select a pin then do Find Similar Objects... and then click Find;

In the right hand panel, select a smaller font size.

Or:

Move the pins to make room for the names then resize the box to fit the new pin positions;

If you do this then you will need to redraw and check the wires.

Then:

Select the whole symbol and click Group/Ungroup Symbol... again;

Enter the new prefix as U?, Q? or whatever the original prefix was;

Enter the original part name.

NOTE: all component information such as Supplier, Supplier name, Manufacturer etc.  will have to be re-entered.

thanks! andy it works!!
but I hope easyeda developer fix this problem..
group/ungroup symbol seems like a hack.

Symbols and Footprints must always he checked before use no matter which library they come from.

Error reports should be submitted using the Report Error menu or right-click option.