Select small fragments to delete
Select small fragments to delete by having a sliding scale or by size. Show colour to indicate the affected area.
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Steve Dixon commented
Thanks for getting back... I'll give the suggested scripts a go.
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Yep, deleting fluff is a quite common operation, and Object > Path > Clean Up dialog doesn’t offer anything to help us.
Meantime, there are some ways to help with the task.
1. A free script by Carlos Canto: https://community.adobe.com/t5/illustrator-discussions/script-to-delete-the-line-which-is-small-in-length-and-line-on-one-another/td-p/3266017
2. A similar script by John Wundes: https://github.com/johnwun/js4ai/blob/master/SelectPathsBySize.jsx (mentioned in a general request here: http://illustrator.uservoice.com/forums/333657/suggestions/31380736)
3. Plugins, like FindReplace Art by Astute Graphics: https://docs.astutegraphics.com/findreplace/findreplace-art-overview (search for '4. Linear Extent' on the page)
4. Probably NitPicker plugin by Hot Door: https://www.hotdoor.com/controlplugins (not sure though)