In Adobe Acrobat DC I use the measuring tool often. When you set the Line properties it will save the style, thickness, colors & opacity but the "Start" and "End" line arrows are reset each time back to "Open". I make the new properties default with the Start and End as "none" but each time I create a new line the arrows return to "Open" so on each measurement I have to open the properties and reset each back to "none". This creates a lot of extra work. Is there a way to set the overall default to "None" or is there a work around. The arrows get in the way for anyone wishing to draw lines on forms.
Sorry for the delay in response.
Please try selecting one of the objects drawn on the pdf > right-click > select measure preferences > default line ending > none.
You may also access this setting by going into edit > preferences > measuring 2d > default line ending.
Feel free to update this discussion if you need any further help.