With any property panel there is a default number of properties set, however you can easily alter this number if preferred. Here's how:

Changing the number of properties within an auto fed panel

Starting in the email editor, click on the relevant property panel to make it active.
The panel feed toggle will be set to Dynamic

From here:

• Select Define Properties
• Within the Define Properties options, stay within the Basic sub menu.
• Under Maximum Properties, select the dropdown to choose your preferred maximum for this panel. If using a grid panel, the numbers will appear in increments of 2.
• Select Continue to update the panel and return to the editor.

Changing the number of properties shown within a panel where properties are chosen manually

If you are choosing properties manually, there are two ways to increase or decrease the number of properties shown.

Starting in the email editor, click on the relevant property panel to make it active. The feed toggle will be set to Static
From here, either:

• Within the panel editing toolbar, choose Edit
• Stay within the Layout sub menu.
• Select the Number of Properties dropdown to adjust the number.
  If using a grid panel, the numbers will appear in increments of 2.
• Click Continue to save your changes.
  
  

OR:

• Scroll to the bottom of the panel, and select - or + to quickly increase or decrease the properties shown in the panel. Grid panels will increase/decrease by rows of 2 properties, List panels will add/remove single property rows.

Note: This affects this panel only, so if you want to reflect this in other property panels in your email, just repeat the process.