supports several image formats for stamps. While you can use 8-bit images, you can achieve better results with images that are 16 or 32-bit depth.
To create stamps with an alpha channel (RGBA) and have 16 bits per channel as their bit depth, you can use an editing application such as Adobe Photoshop.
- Launch Photoshop.
- Select File > New.
- In the New window that appears, set the following options and click OK.
- Width: As required.
- Height: As required.
- Color Mode: RGB Color - 16 bit
- Background Contents: Transparent
(Creates an alpha channel for the image.)
- Advanced > Color Profile: Don’t Color Manage this Document
(Ensures the file is not tagged with an existing color profile.)
A new blank image appears in the work area. A checkered background on the canvas indicates the presence of the alpha channel.
Note:The Height and Width for a stamp image can range between 256 and 512 pixels, and must be square in proportion.
- Paint your stamp.
- Save the image by selecting File > Save As.
- In the Save As window, specify a filename for the image, set the following items, then click Save.
- Format: TIFF
- Layers: Off
- In the TIFF Options window that appears, set the following, then click OK.
- Image Compression: LZW
- Pixel Order: Interleaved (RGBRGB)
- Byte Order: IBM PC
- Save Transparency: On
- Layer Compression: Discard Layers and Save a Copy