# Need Feedback - Changing Bond Lengths - Discoverability **URL:** \ **Category:** Design & Interface\ **Created:** [September 22, 2026, 5:09pm UTC](https://discuss.avogadro.cc/t/need-feedback-changing-bond-lengths-discoverability/7534 "2026-09-22T17:09:11Z")\ **Posts on this page:** 1\ **Showing post:** 1
**Author:** ![ghutchis](https://discuss.avogadro.cc/user_avatar/discuss.avogadro.cc/ghutchis/32/456_2.png) [@ghutchis](https://discuss.avogadro.cc/u/ghutchis)\ **Post date:** [September 22, 2026, 5:09pm UTC](https://discuss.avogadro.cc/t/need-feedback-changing-bond-lengths-discoverability/7534/1 "2026-09-22T17:09:12Z")
One thing that came up in the [survey results](https://discuss.avogadro.cc/t/avogadro-2026-survey-results/7502) were users unsure of how to change bond lengths, angles, dihedrals to particular values. I see that as a documentation problem (e.g., hey, you can already do that by changing values in the property tables) but also a discoverability problem. I can think of a few ways to make it possible to edit particular values in the **tools** : - allow entering specific values in the bond-centric manipulate tool (good idea, but how to edit specific angles or dihedrals) - allow editing values using the measure tool - both The **bond-centric manipulate** tool already has code to change bonds, angles, etc. but it’s free-form. It seems like the best place to start, since it already has the right name. - start a move and then type a value (like Blender) - useful but not discoverable - add a panel to the tool options - but then _which_ angle or dihedral? The **measure** tool could easily add a tool panel, but how many people would think to use the “measure” tool to change a length? Also, if you have two molecules and want to change the distance between them, what’s the most intuitive way to do that? Thoughts? Ideas? --- _[View the full topic](https://discuss.avogadro.cc/t/need-feedback-changing-bond-lengths-discoverability/7534)._