Signature Control Settings

Add a control that displays a digital signature in Screens.

Control Description

The Signature control allows the Request participant to sign and her or his signature in a Screen. The entered signature automatically saves, but is not committed until the signer submits the Screen. The signer may undo the entered signature prior to submitting the Screen. The submitted signature is recorded as a PNG image that may be referenced from an Image control by referencing the Signature control's Variable Name setting value.

This control is only available for Form-type Screens. See Screen Types.

Package Required

To add a Signature control to a Screen, the Signature package must be installed.

Permissions Required

Your user account or group membership must have the following permissions to design a Screen unless your user account has the Make this user a Super Admin setting selected:

  • Screens: Edit Screens

  • Screens: View Screens

See the Screens permissions or ask your Administrator for assistance.

Add the Control to a Screen

Follow these steps to add this control to the Screen:

  1. View the Screen page to which to add the control.

  2. Drag the Signature icon into the Screen Builder canvas. Existing controls on the Screen Builder canvas adjust positioning based on where you drag the control.

  3. Place into the Screen Builder canvas where you want the control to display on the Screen.

  4. Configure the Image control. See Settings.

  5. Validate that the control is configured correctly. See Validate Your Screen.

Below is a digital Signature added in Preview mode.

Move the Control on the Page

See Move a Control on the Page.

Copy the Control with its Settings

Copying a control also copies the current settings of that control. The copied control displays below other controls placed on that Screen page.

Follow these steps to copy a control:

  1. Select the control to be copied.

As a best practice, after copying a control, change the Variable Name setting value for the copied control to its own unique variable value. Otherwise, in-progress Requests that use this Screen read from and send data to both controls.

Delete the Control from a Screen

Deleting a control also deletes configuration for that control. If you add another control, it will have default settings.

Follow these steps to delete a control from a Screen page:

  1. Select the control to be deleted.


The Signature control has the following panels that contains settings:

Variable Panel Settings

Click the control while in Design mode, and then click the Variable panel that is on the right-side of the Screen Builder canvas.

Below are settings for the Signature control in the Variable panel:

Variable Name

Enter the alphanumeric name that identifies this Screen. This field is required.

Use the Variable Name setting value in the following ways:

  • Reference this control's value in a different Screen Builder control. To do so, use mustache syntax and reference this control's Variable Name value in the target control. Example: {{ SignatureControl }}.

  • Reference this value in Visibility Rule setting expressions.

See best practices when editing a Request variable name.


Select the Required setting to clarify that the signature is required to submit the form.

Configuration Panel Settings

Click the control while in Design mode, and then click the Configuration panel that is on the right-side of the Screen Builder canvas.

Below is the setting for the Signature control in the Configuration panel:

Pad Height

The height may be set in any of the following units:

  • em unit, based upon the relative font-size of the parent font size (em)

  • inches (in)

  • percentage (%)

  • pixels (px)

  • relative to the viewpoint's height (vh)

  • relative to the viewpoint's width (vw)

  • rem unit, based upon the font-size value of the root element (rem)

100px is the default height setting.

If the entered value is not in the correct format, the following validation error displays: The Pad Height format is invalid..

Advanced Panel Settings

Click the control while in Design mode, and then click the Advanced panel that is on the right-side of the Screen Builder canvas.

Below are the settings for the Signature control in the Advanced panel:

Visibility Rule

Note the following regarding how to use visibility rules:

Device Visibility

Select on which device types this control displays:

  • Desktop: The control displays only on desktop devices. Enable the Show for Desktop toggle key.

  • Mobile: The control displays only on mobile devices. Enable the Show for Mobile toggle key.

CSS Selector Name

See the following best practices regarding custom CSS in Screens:

pageSignature PackagepageWhat is a Package?pageBootstrap Component Control SettingspageBootstrap Wrapper Control SettingspageCheckbox Control SettingspageDate Picker Control SettingspageFile Download Control SettingspageFile Preview Control SettingspageFile Upload Control SettingspageGoogle Places Control SettingspageImage Control SettingspageLine Input Control SettingspageLoop Control SettingspageMulticolumn / Table Control SettingspageNested Screen Control SettingspagePage Navigation Control SettingspagePhoto/Video Control SettingspageRecord List Control SettingspageRich Text Control SettingspageSaved Search Chart Control SettingspageSelect List Control SettingspageSubmit Button Control SettingspageTextarea Control SettingspageExpression Syntax ComponentspageValidation Rules for "Validation Rules" SettingspageReference Magic Variables in ProcessMaker Platform Assets

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