thunderbird tip - avoid double spacing

While using Thunderbird mail client, it uses "Double space" instead of single space ( not sure how I ended up like this).

The issue is selecting paragraph as default..if you select "Body text" it will be single space.

To make this default, carry out below:

1. Go to the main Thunderbird window and select the following from the menu bar -Tools > Options > Composition > General tab,
2. Uncheck the box that says "when using paragraph format, pressing the enter key creates a new paragraph'.