The bank register register by standard is not editable, to be able to see the foreign currency of transaction, you can just customize from the balance sheet.
Using administrator role , go to :
1. Report>Financial>Balance Sheet
2. Click the amount of the bank account (ex. St. George)
3. Click on Customize button
4. Go to Edit Column tab
5. On the Add Fields>Financial folder, click the (+) sign
6. Click/Select Amount (foreign currency) from the list of fields
7. Name the report
8. Then save
Some report are showing via by period, to be able to show/select the actual calendar dates on the date filter you can go to :
1. Home>Set Preferences>Analytics
2. Report by Period fields , set this to Never
3. The save