debug - Set this to 1 if you are facing an issue with the Power-Up. Then go to the browser's Developer Console to check out the log. I.e. debug=1
unit - If you want to change the unit of measure for the duration in list. Possible values are days, minutes and hours. I.e. unit=days
decimalplaces - Set this to the number of decimal places to show in the duration for each card. I.e. 0 means no decimal places will be shown: decimalplaces=0
badgecolor - Set this to the background color you want for the time badge. Set it to badgecolor=none if you want a transparent background. Possible values: blue, green, orange, red, yellow, purple, pink, sky, lime, light-gray
includelists - Separate the list names you want to include from computation by commas i.e. includelists=TODO,DONE. All the rest will be excluded.
excludelists - Separate the list names you want to exclude from computation by commas i.e. excludelists=TODO,DONE

PREMIUM FEATURES:
When you start using any of these, the 14 day trial will start automatically. After the trial the premium features will cease to work. Go to the Power-Up menu and click Subscription to purchase a premium subscription if you need one.
track - If you want to include only certain lists for tracking time in reports or when using mode setting below to cumulative: track=TODO,DONE
notrack - If you want to exclude certain lists for tracking time in reports or when using mode setting below to cumulative: notrack=TODO,DONE
workhours - Useful if you want to measure work hours especially during time-tracking. Use 24 hour format: worhours=08:00-16:00
startdate - In case you want to start measuring time from a specific date. Use the YYYY-MM-DD format: startdate=2023-01-01
colorranges - Possible color values: blue, green, orange, red, yellow, purple, pink, sky, lime, light-gray. If you have set unit to days, you can do the following: colorranges=0-2 yellow,2-10 orange,10+ red
reportcolorranges - Any color value works for the reports page. If you have set unit to days, you can do the following: reportcolorranges=0-2 #abf0a2,2-10 transparent,10+ red
reportfilter - Possible values to filter the cards displayed on the report are open, closed, all, visible. If you want to show only archived cards do: reportfilter=closed
reportcolumns - You can add extra columns for card properties like id, description etc. Possible values are: id,address,closed,coordinates,creationMethod,dateLastActivity,desc,due,dueReminder,idBoard,idShort,locationName,manualCoverAttachment,shortLink,shortUrl,subscribed,url. If you want to just add id and description do: reportcolumns=id,desc. WARNING: Updating reportcolumns will remove all your save filters.
reportstatusentrancedates - Add extra columns for each list when the card was last moved to. To enable do: reportstatusentrancedates=true
excludedays - Possible values are mon,tue,wed,thu,fri,sat,sun. For instance, to exclude weekeends do: excludedays=sat,sun
format - Format duration. Possible formats are dh, dhm and hm. To display day, hours and minutes do: format=dhm
mode - Add additional badges to card like:
showing time from/until due date: mode=duration until or past due
showing time from/until start date: mode=duration until or past start
showing duration since issue creating: mode=duration on board
displaying cumulative duration in certain lists mostly used for time-tracking: mode=cumulative
displaying only the duration since last move to a list on the card back: mode=non-historical
displaying all the durations in card back section in chronological order: mode=chronological
add multiple modes to show additional labels by listing all like this: mode=cumulative,duration until or past due

Reload the board page after you have clicked save for the settings to kick-in.