Whether probably to create the form as in figure?
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Tool Palette forms are already on the features request / ToDo list.
Helpfully they will get taken care of soon after localization is complete.
Dear BazzaCAD.
How I can create new form as on the picture in OpenDCL?
I need this.
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You can not.
OpenDCL will NOT create a PALLETE.
There has been discussion to do this in the FUTURE.