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A stamp signature is a special type of electronic signature that has the visual appearance of a round seal and its visual parameters can be set programmatically. Every stamp signature can have multiple “stamp lines” with custom text and different line thicknesses, colors, font weights and sizes. Here is an example of how a stamp signature created with GroupDocs.Signature for Python via .NET may look like:
GroupDocs.Signature provides the StampSignOptions class to specify different options for Stamp signature:
- Stamp type - Round or Square;
- Height and width in pixels;
- Alignment and position within the document page;
- and many more.
Each Stamp option contains inner and outer lines. Inner lines represent vertical lines inside the stamp, while outer lines represent circles (or rectangles based on stamp type) around the stamp with their own text, border settings, background etc.
Here are the steps to add a Stamp signature to a document with GroupDocs.Signature:
- Create a new instance of the Signature class and pass the source document path as a constructor parameter.
- Instantiate the StampSignOptions object according to your requirements and specify appropriate options.
- Call the Sign method of the Signature class instance and pass the StampSignOptions to it.
This example shows how to add a Stamp signature to a document using Python:
import groupdocs.signature as signature
from groupdocs.signature.options import StampSignOptions
from groupdocs.signature.domain import StampLine
import groupdocs.signature.domain as gsd
import sys
import os
def run():
with signature.Signature("./sample.docx") as sign:
# Create stamp signature options
options = StampSignOptions()
# Set stamp signature position
options.left = 100
options.top = 100
# Setup first external line of Stamp
outer_line = StampLine()
outer_line.text = " * European Union * European Union * European Union *"
outer_line.font.font_size = 12
outer_line.height = 22
outer_line.text_bottom_intent = 6
outer_line.text_color = gsd.Color.WHITE_SMOKE
outer_line.background_color = gsd.Color.DARK_SLATE_BLUE
options.outer_lines.add(outer_line)
# Inner square lines - horizontal lines inside the rings
inner_line = StampLine()
inner_line.text = "John"
inner_line.text_color = gsd.Color.MEDIUM_VIOLET_RED
inner_line.font.font_size = 20
inner_line.font.bold = True
inner_line.height = 40
options.inner_lines.add(inner_line)
# Sign document
sign.sign("./SampleSigned.docx", options)
### Advanced Stamp Signature Options
Here's an example showing how to create a more complex stamp signature with multiple lines and custom styling:
```python
import groupdocs.signature as signature
from groupdocs.signature.options import StampSignOptions
from groupdocs.signature.domain import StampLine
import groupdocs.signature.domain as gsd
import sys
import os
def run():
with signature.Signature("./sample.docx") as sign:
# Create stamp signature options
options = StampSignOptions()
# Set stamp signature position and size
options.left = 100
options.top = 100
options.width = 200
options.height = 200
# Set stamp type (Round or Square)
options.stamp_type = gsd.StampType.ROUND
# Setup outer lines
outer_line1 = StampLine()
outer_line1.text = " * APPROVED * "
outer_line1.font.font_size = 14
outer_line1.font.bold = True
outer_line1.height = 30
outer_line1.text_color = gsd.Color.WHITE
outer_line1.background_color = gsd.Color.DARK_BLUE
options.outer_lines.add(outer_line1)
outer_line2 = StampLine()
outer_line2.text = " * 2024 * "
outer_line2.font.font_size = 12
outer_line2.height = 25
outer_line2.text_color = gsd.Color.WHITE
outer_line2.background_color = gsd.Color.DARK_BLUE
options.outer_lines.add(outer_line2)
# Setup inner lines
inner_line1 = StampLine()
inner_line1.text = "John Smith"
inner_line1.font.font_size = 20
inner_line1.font.bold = True
inner_line1.height = 40
inner_line1.text_color = gsd.Color.DARK_BLUE
options.inner_lines.add(inner_line1)
inner_line2 = StampLine()
inner_line2.text = "CEO"
inner_line2.font.font_size = 16
inner_line2.height = 30
inner_line2.text_color = gsd.Color.DARK_BLUE
options.inner_lines.add(inner_line2)
# Sign document
sign.sign("./SampleSigned.docx", options)
This guide explains how to apply stamp-based signatures to documents using GroupDocs.Signature for Python via .NET. It covers the process of creating a stamp signature, customizing its appearance, and positioning it on the document. The signed document can then be saved with the stamp signature applied.
You may easily run the code above and see the feature in action in our GitHub examples:
Along with the full-featured Python library, we provide simple but powerful free online apps.
To sign PDF, Word, Excel, PowerPoint, and other documents you can use the online apps from the GroupDocs.Signature App Product Family.
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