Technically, you shouldn't use personal funds to pay for business expenses, or business funds to pay for personal expenses... but we understand it happens sometimes. These, however, are NOT funds transfers.
Here's a few scenarios and how to properly record them:
If you pay for a business card with personal funds, categorize that deposit on your business card account as an Owner Contribution
If you pay for a personal card with business funds, categorize that expense from your business account as a Owner Draws
If you pay for personal expenses with business funds, categorize that expense as Owner Draws