Not sure I understand you query.
You cannot scale the symbols so to make the circuit fill more of the frame, edit the frame size so that circuit fills more of the smaller frame.
This link describes how to zoom the whole view in and out:
https://easyeda.com/forum/topic/How_to_Zoom_Pan_and_change_the_border_of_a_Schematic-bECKEMGzR
* This describes how to zoom everything on the canvas including the frame.
* It also describes how to change the size of the frame separately from the other objects on the canvas.
For further help please post the link to a public copy of your project.
Thanks.
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