What icons are you trying to change? What is preventing you from changing them?
I took a look and it seems you can change the default icons right in the GUI settings menu. I installed BeautyLine to test.
Note most of the applets in the tray do not have a BeautyLine icon, so they are just using whatever icon is available instead. I pinned an app that does have a BeautyLine icon (last one on the right in the dock) and as you can see it is using the correct icon.
As it stands now I don’t think there are any icon packs that support cosmic app icons. I did a bit of a search the past two days an came up short.
Make sure you also have them in a .icons folder in your main home folder so /home/$USER/.icons/... also having gnome-tweaks helps for there apps that don’t respect changes. maybe a fix will be added to cosmic-tweaks but lets hope they do something better then that.
I overlooked this setting.
Thanks, BluishHumility, elite!
You’re probably forgiven, I had to boot up Cosmic today to confirm that both panel and dock could be autohide (thought so…but you know). We can’t remember everything, despite our advanced age and individual wisdom rofl.
I knew that you could set the panel and dock to the background. What I didn’t know was how to replace the icons with more attractive ones (matching my color scheme and background image).
Thank you for your reply.
I sure do like it a lot.
I was just coming here to share – for my own memory-- as much as to say, hey! check it out!
I’ve got the tiling control midway there, witht the clock and Caffeine. that seems good, huh?
Than i need to know if i’m working in more than one workspace, at a glance.
good.
a few go-to apps. good. probably some minimized windows.but i can vefy by moving mouse over left to get that … dock thing to unhide.
Cheers!
it’s not there yet. but i’m getting.
Oh. i’ll put it on my blog thing soo you can see it
Will this be like Mokka, where to get Mokka I had to choose to either install it or stick with Dr460nized, and couldn’t choose one or the other at login?
It is not like Mokka or Dr460nized, which are pre-configured versions of the KDE desktop environment. COSMIC is a completely separate desktop environment that has nothing to do with KDE.
In general, it is not recommended to install multiple desktop environments concurrently because you can introduce conflicts and breakages (oftentimes DEs will include different solutions for the same things). If you want to install another desktop environment you should do a new installation on a spare machine or separate disk/partition/subvolume.
Quickemu is really easy to use and fast to get started with. Most VMs can be spun up with only a few commands. Garuda COSMIC has not yet been added to the quickget utility, but fortunately it is pretty easy to set up a Linux guest manually: 02 Create Linux virtual machines · quickemu-project/quickemu Wiki · GitHub
quickemu-git is in the Chaotic-AUR. This is the easiest installation method.
sudo pacman -S quickemu
Other installation methods are described here: 01 Installation · quickemu-project/quickemu Wiki · GitHub
Create a directory for the VM. It can be called anything you want. For this example, I’m going to call it garuda-cosmic-250430 (easy for me to remember what it is because it’s named after the ISO I tested with 
).
mkdir garuda-cosmic-250430
Next, download the ISO from the builds page, verify the checksum, and put it inside the directory you created.
garuda-cosmic-250430
└── garuda-cosmic-linux-zen-250430.iso
That’s all you need to put in here for now; Quickemu will add other files here as you start working with the VM.
Create a config file for the VM. You can name it the same thing as the directory you just set up, only with .conf in the name.
In this example, we will create the config with Micro.
micro garuda-cosmic-250430.conf
Here is a very simple example config, suitable for getting started. You can just paste it in if you are using the same name that I am using in this example.
#!/usr/bin/quickemu --vm
guest_os="linux"
disk_img="garuda-cosmic-250430/disk.qcow2"
iso="garuda-cosmic-250430/garuda-cosmic-linux-zen-250430.iso"
disk_size="32G"
disk_img should point to the directory you created earlier (“garuda-cosmic-250430” in this example). disk.qcow2 is a file Quickemu will create inside.
iso is pointing to the ISO file you put in that same directory earlier.
Disk size is handled dynamically with Quickemu, but in our case we need to specify disk_size="32G" in the config because Calamares won’t run if it doesn’t detect a potential installation target that is at least this size.
This is a very minimal config; if desired, advanced configuration is possible with other options described here: 05 Advanced quickemu configuration · quickemu-project/quickemu Wiki · GitHub
Launch the VM with the quickemu --vm [your config file].
quickemu --vm garuda-cosmic-250430.conf
That’s it, your VM is running! Told you it was fast and easy.
You can launch the VM with the --shortcut flag to create a desktop shortcut for your VM.
quickemu --vm garuda-cosmic-250430.conf --shortcut
Now you can start your VM from your launcher instead of running the command.
Once you’ve had enough, if you’d like to delete the VM (and it’s configuration) you can use the --delete-vm flag.
quickemu --vm garuda-cosmic-250430.conf --delete-vm
That’s it, I guess I just wanted to show how fast and easy Quickemu is to get started with in case anyone is curious to test out the COSMIC desktop but doesn’t have a test machine or a multiboot setup to tinker with. I’m not a Quickemu expert by any means, and I don’t want to turn this into a Quickemu support thread, but if you have any questions about it I’ll do the best I can to answer them.
Have fun exploring! 
