I want to insert my own picture for the message on the Noticeboard, how big should it be?

The picture for each message is mandatory on the Noticeboard. If the user does not choose from the IS Gallery, he can upload his own image from his device.

1You can upload an image from your device or choose from the IS Gallery.

The ideal parameters of your own image are:

minimum size 1200x450 px, but for best results 1600x620 px, larger is not recommended;
the ideal format is JPG;
the ideal file size is 200 KB, then it will load quickly, the maximum file size is 1 MB.