Every Progress Tracker has an icon, as shown below as an example
Makerble automatically assigns an icon to each Progress Tracker but you can upload your own while either creating a new Progress Tracker or editing an existing one.
Steps
While creating a new Progress Tracker
While on the Create Progress Tracker tab, scroll down to the Advanced section and open it by clicking the arrow
Press the Choose file button next to Add custom icon
Select a file from your device
The file’s name will be displayed next to the Choose File button
Press Save Changes