If you want to save your board to your computer as a fast reference, without exporting in higher resolution, you can do so by enlarging and right-clicking your mouse. This is great work-around instead of emailing the board to yourself.
Step 1: open the board within your profile
Step 2: click on the board to enlarge it and the right-click your mouse to "save as" to your computer
For exporting options as well as tips for top quality exporting, please refer to this article.