Please refer to Trust settings. 

Configure the default Time Stamp Server to embed a trusted time stamp while signing. 

• Enable pressure sensitive: Enable pressure sensitive so that you can add free-form annotations with PSI in PDFs by supported touchscreen devices. 
• (For Subscription Releases) Auto-hide cursor when stylus is detected: Specify whether to automatically hide the cursor while drawing with the Pencil tool on tablet-type devices. This option is checked by default.

• Enable check spelling: Check Enable check spelling to avoid spelling error.
• Dictionaries for Spell Check: Add, remove, or reorder the dictionaries for spell check. 

• Volume: Sets the reading volume of Read out Loud.
• Use default voice: Check it to read content with default language, or you can select the required one from the combo box.
• Use default speech attribute: Check it to read with default pitch and rate, or you can uncheck it and then set pitch and rate in the combo box as needed.
• Read comments: Check it to enable the application to read out the comments when executing Read out Loud.
• Read form fields: Check it to enable the application to read out the form fields when executing Read out Loud.

• Default Signing Format: Choose a default signing format based on PKCS#7 or CAdES standard. PKCS #7 - Detached is selected by default. 
• Appearance Styles: Manage the signature appearance templates.
• Signing & Verifications

1. Sign the document immediately after the signature is placed: Check this option to sign the document immediately when you place the signature on the document. By default, this option is checked.

• Protected View

  To protect your computer from files originating from the Internet or other potentially unsafe locations, turn on Protected View to open these files to reduce risks. In Protected View, files are read only and most editing actions are not allowed.

• Privileged Locations

• Search

  Ignore Asia character width: With this option selected, both half-width and full-width instances of the Asian language characters in the document will be found.

  Ignore Diacritics and Accents: Ignore the diacritics and accents to find items with any variation of the alphabetical characters. For example, if you type “resume”, both “resume” and “résumé” will be found.

• Automatically check for new comments: 

  Set the time interval to automatically check for new comments during shared review. By default, Foxit PDF Editor will check for new comments every five minutes during shared review.

• Shared Review Options

• Page vs Document