You can easily trigger an export of your dashboards within Bright Analytics.
When you are on a dashboard you will see a camera icon in the header:
Clicking this will reveal 2 export options : Image or PDF
Click your chosen format and this will be generated in the background and a download prompt will let you choose where to save the output to.
Some of the advantages of taking a screenshot this way - rather than a screengrab through your browser - include:
Date ranges are rendered as an absolute date range rather than saying 'Last Week'
Various bits of the BA user interface are hidden before the screenshot is generated, resulting in a cleaner output
We are currently working on adding the option to schedule a dashboard export - this is expected to be live second half of October 2019.