I'm also looking forward to Hi-DPI support being fully implemented in Pharo. Until then, there is the "Display scale factor" slider and the ability to change the font size. However, most have probably already noticed that these controls don't affect the size of the mouse pointer, which can be annoying as it's much harder to find on big screens. I recently found this posting, which is helpful: Scaling for HiDPI in Pharo: 1.) Evaluating "MenubarMorph reset" will fix the menu bar scaling factor. 2.) There's a SQUEAK_FAKEBIGCURSOR env var which you can set to 1 to have the VM display the cursor twice as big as normal. I've no idea why the word 'FAKE' is part of this; from the source it looks like it just creates a normal X11 cursor that's twice as big as normal. This should work with Cuis, Squeak, and Pharo, as it's part of the VM. I found that entering "export SQUEAK_FAKEBIGCURSOR=1" will cause standalone Pharo to have a normal-looking pointer on 4K displays, but this does not seem to work as expected with Pharo Launcher, or images launched with Pharo Launcher. After some investigation, I determined that the 'pharo-launcher', 'pharo' and 'pharo-ui' bash scripts (for Pharo Launcher and Pharo IOT) can be modified to make this work. The trick is to add "env SQUEAK_FAKEBIGCURSOR=1" to the front of the command that launches the VM/image within the above scripts. I've fashioned a set of 'sed' one-liners to automate editing these scripts accordingly, and am in the process of making a bash script that will use them to add/remove/verify these edits in a user-friendly fashion. (I also have scripts that install Pharo Launcher and Pharo IOT in Linux, that create & add clickable launcher icons; my plan was to modify these scripts to write the cursor size correction scripts into their respective folders when they're installed.) I'll make this available when it's complete, likely in the next couple of days. -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

I've finished the script I mentioned and put it on GitHub; it's called 'pharo-adjust-cursor'. https://github.com/tbrunz/installer_scripts It will edit the bash scripts that launch Pharo applications (i.e., pharolauncher, pharoiot, etc.) to either enable or disable enlarging the GUI pointer. This is useful on Linux systems with a 4K hi-DPI screen, since currently Pharo can enlarge its fonts and other GUI features, but not the cursor. (I don't have a Mac, so this is maybe not applicable to hi-dpi Macs.) The script can edit the Pharo application scripts "in both directions", to either enlarge the cursor or return it to normal size, depending on the option switch included on the command line. There are no side-effects caused by running the script multiple times in a row. Edits will create a backup file, with a name extension appended that reflects the script version backed up. Restoring a backup must be done manually. If run in a Pharo application directory (such as 'pharolauncher'), it will edit the scripts in just that directory. If run in a directory that contains one or more Pharo app directories, it will edit the scripts in each of them that it finds. (If neither situation is met, it will complain, and will complain if the expected Pharo bash scripts aren't found.) Comments & suggestions for improvements are welcome... -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html