in Openhab it was possible to define a default chart size:
#
# Set the default height of a chart if the client doesn't provide this in the request
# defaults to 240
#chart:defaultHeight=240
#
# Set the default width of a chart if the client doesn't provide this in the request
# defaults to 480
#chart:defaultWidth=480
I also can´t find this setting for OH2. The default chart size after installation is not really useful for practical purposes so it is necessary to define another chart size.
Also important because the tranparency/opacity of the chart legend box which is above the chart lines seems to be no longer available.
In OH1 there was a setting for scaling too. Because on my smartphone i get a very big picture with small items and on my desktop computer the chart is still way to small for the screen resolution.
I will look for my old settings in OH1 and try this in OH2.
scale only changes the aspect ratio on my android phone inside openhab app (formerly known as habdroid). I use 0.8. With 1 i have to move the chart up and down on my phone, with 0.8 i get it on one screen completely.