FreeOffice sets its file associations in ~/.config/mimeapps.list (also in /usr/share/applications/defaults.list but they get overriden by ~/.config/mimeapps.list).
You can use the following sed command to replace the FreeOffice entries with the respective LibreOffice ones in ~/.config/mimeapps.list:
sed -i -e 's/textmaker-free18/libreoffice-writer/g' -e '...
The icon styles are in /usr/share/libreoffice/share/config
$ ls -1
LibreOffice stores most user-set values in ~/.config/libreoffice/4/user/registrymodifications.xcu.
The icon names used in ~/.config/libreoffice/4/user/...
You haven't mentioned the version of LibreOffice you're using but I have no problem with Heading 3 entries after exporting to PDF format.
The image below shows Evince with a pdf file generated in Libreoffice 6.0.7 running on Ubuntu 18.04. (I also have tried with LibreOffice 6.3 running on Kubuntu 18.04 and have no problem there either.)
As you can see, the ...
SoftMaker FreeOffice :
Solution 1. : Right click the file to open → Select : Open with other → select LibreOfficeWriter ... and tick "Remember ..." .
( 2.) Example files, SoftMaker Office ( A 2016 version )
/usr/share/applications/defaults.list // all lines are textmaker, planmaker etc. SoftMaker Office
Styles in Impress are like paragraph styles in that they only apply to entire paragraphs. Also, it is not possible to create new Drawing Styles, and Presentation Styles only apply to shapes such as text boxes created with the "insert text box" option. In short, styles are recommended in Writer, but in Impress, direct formatting is best in most cases.
Research: I'm seeing the same issue on Debian 10 with the Mate desktop. I have /etc/fstab configured to mount the (NAS) Cifs at boot time, but the MATE desktop file manager seems to mount it a second time. If I navigate to a file on the cifs starting from the File Manager "filesystem" shortcut, it finds the boot-time mount point, and LibreOffice opens the ...