You can create a pop-up window of a specific size by inserting a text link or a link in the menu item, which can be done by the following steps:

Step 1: Select the menu item in Menus edit item panel

With a project opened in A4Desk Pro, select the menu item you would like to open the pop-up window or add the text link in Menus edit item panel.

Step 2: Link to the pop-up window

Option 1: Insert a link in the menu item

1. Select "Link" option under Edit Item box

2. The "Link" tab will be displayed at the bottom of the screen, click the "Custom Link" button

Option 2: Insert a text link

1. Select "Text" option under Edit Item box

2. The "Text" tab will be opened, select the text you want to open the pop-up window,
click the "Link" button at the bottom of the screen.

Step 3: Set the size of the pop-up window

1. Enter the URL in "Link Adress" box, select "Javascript Pop-up with custom size" and enter
the specific width and height. Click "Add" button to apply the settings.

2. Save and publish the project. When user clicks the menu item or the text link,
the pop-up window of a specific size will be displayed.