To upload a logo - Click the Choose File button to open the dialog box. Choose the image file you want to upload and click the Open button. (These image formats are acceptable: jpeg, gif, png.) MAKE SURE THERE ARE NO NON-ALPHANUMERIC CHARACTERS IN THE FILE NAME Enter desired transparency threshold value. (See note on Transparency Threshold below for more information.) Click the Upload button. You can adjust the logo size, placement and rotation once the upload is complete by clicking on the logo within the main image. Notes: Transparency Threshold - Ideally uploaded logos must have a transparent background. If your logo does not have this property you can optionally have its background be made transparent provided it is white (or 'near' white) by entering a transparency threshold value. A threshold value of 0 will make transparent all pixels with RGB values where the R, G, and B components are all exactly 255, i.e., only white pixels will be transparent. On the other hand, a non-zero value, say N, will make transparent all pixels with RGB values where the R, G, and B components have values from (255-N) to 255, i.e., white as well as 'near' white pixels will be transparent. , Lightweight, roomy and highly breathable, these moisture-wicking, value-priced tees feature PosiCharge technology to lock in color and prevent logos from fading.|, Share product information with your customers by completing the fields below. SanMar will not be mentioned in the email. Up to five email addresses allowed, separated by a comma. SanMar respects your privacy, and these addresses will not be shared..