Hi Brett,
Glad you found the information you needed. And just to make sure you are heading in the right direction, selecting ASME as your Drawing Format configures the new drawing to use the ASME drafting standard. As a result, you get third angle projection, imperial sheet sizes (A, B, C, D and E) and ASME compliant dimensions and text (e.g. 0.12in text height). Similarly, selecting ISO configures the new drawing to use the ISO drafting standard. As a result, you get first angle projection, metric sheet sizes (A4, A3, A2, A1 and A0) and ISO compliant dimensions and text (e.g. 3.5mm text hieght). Units only control the units used by dimensions. Selecting inches gives you imperial dimension values, and selecting millimeters gives you metric dimension values.
So now to your custom title block question. Unfortunately, Fusion Drawings does not yet support custom titleblocks. Its on our road map but you probably won't see anything until after we've released GD&T symbols and the ability to add multiple sheets to drawings. I do however have a question about your needs. Do you have an existing file that contains your titleblock (maybe an AutoCAD drawing) which you are hoping to reuse, or are you wanting to create a titleblock from stratch in Fusion Drawings?
And now for inserting a bottom view into your drawing. My assumption here is that you have a model and you want to place a view of it (viewed from the bottom) within a drawing. Hope this is correct. So when creating a new drawing, the Base View command is automatically launched. As a result, you should see a preview of your model attached to your cursor and the VIEW PROPERTIES command dialog. By default, the preview is viewed from the front. To change this, click the Orientation property within the VIEW PROPERTIES command dialog and select Bottom from the list. The preview should immediately update to reflect the orientation change. Note: the list of orientations is based on the model's orientation; front, top, right, etc. So if for some reason the bottom view is not what you expect, take a look at what the view cube within the model calls the view you need, and select it from the list.
Hope this helps and looking forward to hearing about your titleblock requirements.
Thanks,
Andrew
15" Retina MacBook Pro (Late 2013), OS X Yosemite (10.10.3), in Sydney Australia
Andrew de Leon
Experience Designer - Fusion 360
MacBook Pro (16-inch, 2019), OSX 10.15.7, in Sydney, Australia