Click on the three dots at the end of the line of an injury/illness > Click on 'Historical view'
Here, the progression is shown in a chart:
The progression can be added to an illness/injury via a coupled doctor/paramedic appointment. Here, you can select the progression:
General info: user functionalities depend on the roles & permissions settings. If a certain functionality does not work within your user account, this will be because you don't have sufficient permissions for this.