In order to use your Zebra LP 2844 for use with ScanPower you will need to use Google Chrome. FireFox does not have the ability to support the required settings.
First, you need to find the Zebra printer in your computer's printer settings and set it as the default.
Next, you need to select the printer's preferences page in order to change the settings. In Windows when you right-click on the printer you want to select PRINTER PREFERENCES. From there you need to match your preferences page to the one shown below. Notice the changes in the bottom 2 sections (Size and Unprintable Area). After you have made the changes you need to click APPLY. (FYI, there are more instructions below the following image.)
Next, go to your LIST Settings page in ScanPower at https://unity.scanpower.com (SETTINGS > LIST). From there you need to make sure that the printer is set to NONE DETECTED and SAVE the settings even if you did not make any changes.
Next, go to your main LIST screen by clicking LIST, open a shipment and select an item from the shipment for which to print a label. To print the label right-click on the item and click PRINT LABEL. Once the print preview page appears you need to select the settings as shown below.
A label which looks like the image below will print. You then need to adhere the label to the item and you are good to go.