Qualifio campaigns are designed to automatically number questions.
In case this doesn't meet your needs, you might want to change this setting.
To remove question numbers go to Look & Feel > Texts and uncheck the option Show subtitles.
This will turn off question numbers in your campaign, as well as the Your information subtitle on your form.
Once the default subtitles are turned off, you can return to the Form step of your campaign and manually add the text you desire under Optional text above or below the form.
This also applies to the reverse setting: if you want to remove the Your information subtitle, it will also turn off question numbers in your campaign.