In BioExplorer click on the "tools" menu, and " filter tool ". Most of the EEG INFO designs on www.neuroamp.com will contain a blank space for the filter tool .

To adjust the frequency on the fly, click on the band that you want to change on the filter tool . With the band highlighted on the filter tool use the left and right arrows to move the entire band up or down in frequency. Use the up and down arrows to make the filter wider or narrower.

If the filter tool goes missing. In other words you click on tools, and filter tool , and nothing shows up. 
 - First try moving windows to the side to make sure that it is not underneath some other window.
 - Next, If you have hooked up a second monitor, or sometimes this can happen if you have simply changed down from a larger resolution, the filter tool  will disapear off the screen. The only way to get it back (and even uninstalling and reinstalling will not solve the problem) the only way to get it back is to either change back to the higher resolution, or hook up a second monitor again and look for the filter tool . Browse to the section on this knowledgebase on connecting a second monitor - once you have connected a second monitor, you may need to slide the monitor configuration around, looking for the filter tool in each possible monitor configuration. In the windows properties, where you see the little boxes that represent the monitors, which show a 1, and a 2, for each monitor, slide the number two around the number, trying to the right, and to the left, and above, and below, and search around, hittling apply at each location, and then looking at the second screen to see if the filter tool is there.  Once you locate the filter tool , drag it back onto monitor one before disconnecting monitor two.