I try to solve a problem

Edit text via doubleclick
Move elements by drag'n'drop
Window ×
  • Tab1
  • Tab2
  • Tab3

Paragraph (Markdown Supported !)

  • option
  • other option

There is no stack/layer management nor multiple element selection. Elements are grouped by dragging one element on/in another. Grouped elements move with their parent(s)

Delete elements using the del-Key or the toolbar button. Call up the resize canvas dialog by clicking on the button, when you run out of space

Improve quickMockup on https://github.com/jdittrich/quickMockup

made by Jan /@simulo

Drag these elements in!