Here you can configure global commit options. Choose Remind me to enter a commit message to make SmartSVN warn you when trying to commit without a message. Choose Trim whitespaces from commit message to trim leading and trailing whitespaces from the commit message directly before committing. Choose Warn for case-changed files to make SmartSVN warn you before trying to commit case-changed files; even when warned, you will still be able to continue with the commit.
Specify to Remember up to a specific amount of entered commit messages for each project.
Choose for For File Commits if you want to be warned for potentially missed files when performing a commit: