Sorry but you cannot directly edit Gerber files in EasyEDA. To edit Gerber files, you will have to import and edit them in a one of several proprietary, non-free 3rd party tools.
Please see:
[https://easyeda.com/forum/topic/Getting-a-previous-order-back-into-the-editor-0f97a8a0ac9f43fdb6a9acb77d717fbc](https://easyeda.com/forum/topic/Getting-a-previous-order-back-into-the-editor-0f97a8a0ac9f43fdb6a9acb77d717fbc)
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