Switch to icon-theme Colibre. Start Draw or Impress. The standard toolbar should have an icon, which shows an outlined F. If belongs to the command .uno:FontworkGalleryFloater. Now customize the toolbar and add the command "Fontwork" from the category "Format". It belongs to the command .uno:FontWork. Notice, that both commands use the same icon. This is neither a problem in Sifr nor in Tango or Breeze. My suggestion is to use an icon which shows a character on a path. The command name .uno:FontWork is only historical. The feature is commonly known as "text on path".
If I find "fontwork" in customize/toolbars dialog, I see six entries and three have the icon: Fontwork, Fontwork Shape and Fontwork Style In breeze and sifr icon sets, 2 have the same icon, Fontwork and Fontwork Shape Same problem in LO 6.1.0.1.0+. Tested under Ubuntu. Set status to NEW. Best regards. JBF
andreas kainz committed a patch related to this issue. It has been pushed to "master": https://git.libreoffice.org/core/+/f60bc2a18ef759a0ec9dcb2718d3063291b0d899%5E%21 tdf#118813 update colibre Fontwork icon It will be available in 6.3.0. The patch should be included in the daily builds available at https://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More information about daily builds can be found at: https://wiki.documentfoundation.org/Testing_Daily_Builds Affected users are encouraged to test the fix and report feedback.
andreas kainz committed a patch related to this issue. It has been pushed to "libreoffice-6-2": https://git.libreoffice.org/core/+/41b7b96a026d8fe7114ce4acc29e7ac358a7372d%5E%21 tdf#118813 update colibre Fontwork icon It will be available in 6.2.0.2. The patch should be included in the daily builds available at https://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More information about daily builds can be found at: https://wiki.documentfoundation.org/Testing_Daily_Builds Affected users are encouraged to test the fix and report feedback.