EasyEDA's preview dialog and toolbar can be resized and double click the Title toroll up, check the below Gif guide.
Oops.
The link to the original Gif has been broken but this describes resizing/hiding the top and side Toolbars:
https://easyeda.com/forum/topic/First_tool_bars-o531nJH20
To make the floating Preview and Toolbars roll up and back down, either:
1. left-click on the green button at the right hand end the toolbar;
2. Double left-click on the pale blue area at the top of the toolbar.
![enter image description here][1]
To hide a floating toolbar:
![enter image description here][2]
[1]: /editor/20170405/58e4a28de3def.png
[2]: /editor/20170405/58e4a30c43392.png
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