This user manual covers all features included in Foxit PDF Editor Subscription Release and Foxit PDF Editor Perpetual Release, hereafter named Foxit PDF Editor. For information on the deployment of Foxit PDF Editor in an enterprise environment, please refer to Foxit PDF Editor Deployment and Configuration.
For more information, please refer to "Text Style Button".
The Text Style buttons in the Format tab
Button | Name | Description |
 | Bold | Text with bold formatting has thicker strokes than its ordinary form. |
 | Italic | Text with italic formatting leans to the right. |
 | Underline | Draw a line under the text. |
 | Strikethrough | Draw a line to cross out text, making others know the text is deleted. |
 | Superscript | Decrease the font size proportionally and raise the baseline, like the registered trademark symbol ®. |
 | Subscript | Decrease the font size proportionally and lower the baseline, like a footnote. |
 | Font Color | Simply click on the font color button to apply the color shown to the text, or click on the drop-down menu to select a color for the text. |
 | Character Spacing | Set the space between each individual character that you type. |
 | Writing Direction | Set the writing direction (left-to-right or right-to-left) in which you type text. |
- 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
- 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. When it is unchecked, you will need to click Sign Document to apply the signature after placing it on the document. You can still modify the document before applying the signature.
- Control how and when signatures are verified: click Change Settings to choose options.
- Verify signatures when the document is opened: If this option is checked, Foxit PDF Editor will verify the signatures when the document is opened, and will display the signature verification results in the Digital Signatures panel. By default, the option is checked.
- When document has valid but untrusted signatures, prompt to review and trust signers: With the option selected, if the signature (not including certified signatures) is verified as valid but is applied by an untrusted signer with a certificate that doesn’t chain up to a trust anchor, a message box appears in the top-right corner of the application window to inform you the document includes signatures from signers that you haven’t trusted yet. You can click Manage Trust in the message box to trust the signer. More information, please refer to Trusted Certificates. To make sure that the notification message is displayed successfully, please check the Show the message which affects the next step option in the preferences about Notification Messages.
- Verification Behavior
- Require certificate revocation checking to succeed whenever possible during signature verification: Specify whether or not to check the revocation status of certificates while verifying signatures.
- Use expired timestamps: Uses the secure time provided by the document timestamp or the timestamp embedded in the signature, even if the timestamp’s certificate has expired. The option is selected by default. With the option unselected, the time provided by the expired timestamps will be discarded and the verification time will be the time at which signature was applied or the current time in the system based on your setting on Verification Time.
- Ignore document validation information: Specify whether to ignore the related certificate revocation information embedded in the document when validating signatures.
For flexible and convenient management of plugins, Foxit PDF Editor offers a Plug-in Management Platform, in which you can view the plug-in status, learn the information about the plugins installed, as well as manage the plug-ins as needed.
To open the Plug-in Management Platform, please choose Help > Plug-in Management.
Plug-in Status
Foxit PDF Editor lists the plug-ins that have been installed in the About Plug-in Management window. Some plug-ins will be loaded the first time you use the related features. When the plug-in is successfully loaded, a checkmark will be displayed in the Loaded column. You can view the plug-in status in the following two columns:
- Certified: Shows whether the signature of the plug-in is valid or not.
Loaded: Shows whether the plug-in has been loaded successfully or not.
Note: Some plug-ins are not loaded immediately (i.e. in the standby status with
shown in the Certified and Loaded columns). These plug-ins will be loaded and certified after you use the related features.
Plug-in Information
In addition to plug-in status, you can learn more information about the plug-in installed, including the name, date, description and legal copyright.
To learn the details of a plug-in, please click More… under the general description of the plug-in in the Plug-in Management Platform.
Plug-in Management
With the Plug-in Management Platform, you can manage the plug-ins as needed, including installing, enabling, disabling and uninstalling plug-ins.
Installing a Plug-in
Foxit PDF Editor allows you to install a plug-in in FZIP format. You can also install one or more plug-ins by using an XML file. An XML file defines the information about plug-ins to be installed, and should be used together with .fpi files. (Tip: For a plug-in in MSI format, double-click it to install it.)
- Select Help > Plug-in Management to open the Plug-in Management Platform.
- Click Install Plugin in the About Plug-in Management dialog box.
- In the Open dialog box, do one of the following:
- To install a plug-in in FZIP format, select FZIP Files (*.fzip) from the file type drop-down list beside the File name box, choose the file from your local disk, and click Open. When the installation completes, click OK.
To install one or more plug-ins by using an XML file, select Plug-in File (*.xml) from the file type drop-down list, choose the XML file from your local disk, and click Open. Then Foxit PDF Editor will verify whether the signature of the plug-in is valid or not. If it is valid, Foxit PDF Editor will load the plug-in. Otherwise, the installation will be terminated.
Tip: If you install plug-ins by using an XML file, please place the .xml file and .fpi files in the same folder to avoid an installation failure.
Disabling a Plug-in
To disable a plug-in, please follow the steps below:
- Select Help > Plug-in Management to open the Plug-in Management Platform.
- Select the plug-in you want to disable, and switch its On/Off toggle to Off.
Enabling a plug-in
To enable a plug-in, please follow the steps below:
- Select Help > Plug-in Management to open the Plug-in Management Platform.
- Select the plug-in to be enabled, and switch its On/Off toggle to On.
Uninstalling a custom plug-in
To uninstall a custom plug-in (not built by Foxit), please follow the steps below:
- Select Help > Plug-in Management to open the Plug-in Management Platform.
- Select the plug-in to be uninstalled, and click the Uninstall button
to uninstall it. For a plug-in that has been uninstalled, you can click the Undo Uninstall button 
to reinstall it.
Notes:
- All the operations to the plug-ins will take effect after you restart Foxit PDF Editor.
- Foxit PDF Editor includes plug-ins that are necessary for the realization of its functionalities or are necessarily required for maintenance. To ensure normal operation, you are not allowed to disable or uninstall these plug-ins (such as Foxit Updater plugin, Plug-in Platform plugin, etc.)