<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;">Hi Steve,<div class="">I can’t think of any way to create 3D curved arrows. However, there are some possibilities for straight arrows and 2D curved arrows that may be good enough for your purposes:</div><div class=""><br class=""><div class="">(A) 3D straight arrows (cylinder + cone) can be created in the BILD text-file format and read it in.</div><div class=""><<a href="http://unicode.org/charts/#symbols" class="">http://unicode.org/charts/#symbols</a>></div><div class=""><br class=""></div><div class="">(B) 2D labels are text labels that can be dragged around in the plane of the graphics window. Although Chimera also has 2D straight arrows that can be interactively repositioned at either end by dragging, ChimeraX does not have these (yet). ChimeraX 2D labels can only be text and symbols. However, symbol characters include both straight and curly arrows, and you can make them all different sizes. </div><div class=""><br class=""></div><div class="">You just can’t adjust the proportions of the symbol, and you cannot rotate it at all even in the 2D plane (cannot turn it sideways or diagonal), and they are only 2D (will not actually wrap around your bond or objects in 3D space).</div><div class=""><br class=""></div><div class="">ChimeraX also does not yet have the graphical interface to 2D labels that Chimera has, so you have to define them in the 2dlabels command using unicode character codes or character names:</div><div class=""><<a href="http://rbvi.ucsf.edu/chimerax/docs/user/commands/2dlabels.html" class="">http://rbvi.ucsf.edu/chimerax/docs/user/commands/2dlabels.html</a>></div><div class=""><br class=""></div><div class="">It can be a pain to find the unicode for the exact arrow you want, however, even if you don’t mind the other limitations above.</div><div class=""><<a href="http://unicode.org/charts/#symbols" class="">http://unicode.org/charts/#symbols</a>></div><div class=""><br class=""></div><div class="">I attach an image with a 2D label made with this command:</div><div class=""><br class=""></div><div class="">2dl create arrow1 text '\u21BB' size 80 color yellow<br class=""><br class=""></div><div class="">I didn’t make the icons you showed, but I’m pretty sure that the arrow parts of the icon images were not drawn in ChimeraX.</div><div class="">I hope this helps,</div><div class="">Elaine</div><div class=""><div class="">-----<br class="">Elaine C. Meng, Ph.D.<br class="">UCSF Chimera(X) team<br class="">Department of Pharmaceutical Chemistry<br class="">University of California, San Francisco<br class=""></div><div class=""><br class="webkit-block-placeholder"></div><div class=""><img apple-inline="yes" id="68D5519F-74F6-43E6-B11C-07F4091DB47D" src="cid:6E65EC68-1A92-4C84-8ECE-ED79BC8F1554" class=""></div><br class=""><blockquote type="cite" class="">On Feb 28, 2019, at 1:46 PM, Steve Chou <<a href="mailto:stevezchou@gmail.com" class="">stevezchou@gmail.com</a>> wrote:<br class=""><br class="">Dear ChimeraX team,<br class=""><br class="">I need to draw straight and curved arrows to show the straight and twisting forces on the molecules. See the attached images (cropped from ChimeraX interface) for details. Does ChimeraX have the functionality to do this?<br class="">Steve<br class=""><span id="cid:1693612a1b433cc332f1"><IMG_8385.jpg></span><br class="">-- <br class="">Steve Chou<br class=""><br class=""></blockquote></div></div></body></html>