I personally create all my dashboards on IPAD Landscape. That way, no matter what size screen or resolution the user has they are going to see the whole dashboard without any scroll bars (very few mobile exceptions.) This also means that I can't put too much on a single dashboard and keeps me from getting really busy dashboards that are too much for the user at one time.
Not exactly what you asked, but thought it might be helpful.
Keep it to automatic if you want screen to be completely occupied but ensure all you labels are appearing in the right places in particular resolution. If the display resolution decreases (Size is automatic but dashboard is viewed on smaller screen) then you will be in trouble. It would be better if you take exact (avg resolution that your user going to use to view the dashboard.)
Just got back in the office and watched this. This...is...amazing. Thank you for the link! This should really help with my issue, especially as we start to discuss mobile here at my company (we don't use mobile yet).
Any idea if we can add Device Types or Models? In other words, I know Tableau comes pre-loaded with Device Types and Models, but if I know we run executive presentations in a certain conference room and I know the resolution on that large-screen TV, it would be amazing to be able to load that TV into the dropdown and ensure that our dashboards will work on that device when we're building.
(If there's a thread about this, or a separate 10.0 forum I should ask this question in, please let me know).
This is a great question. For 10.0, we're not supporting the ability to add custom device model to Device Designer. This is something that we considered including in 10.0 but one issue is that the model list needs to match the Tableau Server device detection logic. We were concerned that some customers might, for instance, add a device that they consider a phone but Server considers laptop. Notice that we list the iPad Pro under Device: Desktop because it has a very high resolution.
We may revisit the custom device model list in future release but we'll have to find a way to validate the device screen size to ensure that it works correctly.