Your default Gmail account is the one that dictates a lot.If you want to change your default Gmail account, you'll need to sign out of all your existing accounts and then re-sign in on a browser that will save your preferences; you can then add your other accounts to your new default.
Step 1: You can navigate to your inbox.
Before you start, make sure this is your default account.
Step 2: You can click on your profile image.
This can be found in the top right corner of your inbox page.
Step 3: The drop-down menu has a sign out option.
All linked accounts will sign out, as will your default Gmail account.
Step 4: Click your preferred account to open it.
Step 5: Your account's password needs to be entered.
Step 6: Click "sign in"
From here, you can add your other accounts to your new default account.
Step 7: You can click on your profile image.
Step 8: You can add an account from the drop-down menu.
Step 9: You can add an account by clicking on the name.
You can add a new account at the bottom of the page.
Step 10: You can type in the additional account's password.
The email address is required if you're adding a previously-unlinked account.
Step 11: You can sign in when you're done.
Your secondary account should be linked to your default account.You can link as many accounts as you want.