How to enable / disable link preview

• Go in your bot:
☞ Post Editor.
• Select the button whose message preview you want to change.
• Press the inline button with an asterisk ( * ) below the message to enter its Settings.
• Click «Link Preview» to enable or disable it for this single post.

This setting works in 3 modes:
Modes:
As Admin ⏯- Preview links "as Admin" (see below)
Off ⏹️- preview is disabled.
On ▶️ - preview is enabled.
The current state of the option is written on the button.

Read more in how to manage links preview.