Support forum for Cumulus weather station software
https://cumulus.hosiene.co.uk/
The "Graphs" Window
This window can be displayed by selecting Graphs from the View menu.
The data in the large graph is sampled every minute (apart from the Min/Max Temp and Daily Rainfall graphs, which are daily values), while the data in the smaller graphs is sampled every ten minutes.
Right clicking on one of the larger graphs brings up a pop-up menu allowing you to change the colour used for plotting that graph.
Right clicking on the outside temperature and humidity graphs also allows you to choose which items are plotted on those graphs.
You can change the graph captions using a strings.ini file; refer to the wiki - http://wiki.sandaysoft.com/a/Strings.ini
Clicking on one of the smaller graphs causes its larger version to appear in the large graph area. You can 'zoom' an area of the large graph by dragging with the mouse; to 'unzoom', drag from lower right to top left.
Note that if you are uploading graph images to a web site, they will appear exactly as they are in Cumulus - e.g. if you have 'zoomed' them, that is how they will appear on the web site.