How do I select or deselect accounts?

You can select and deselect accounts by clicking the account selector in the upper right corner. This will show you a list of all available accounts.

You select/deselect individual accounts by clicking them. If you want to select/deselect all accounts belonging to a currency, you can click the currency. Likewise, you can click All accounts to select/deselect all accounts. 

If you have excluded some accounts in the Dashboard settings, these accounts are not shown on the list.