Unable to resize width of columns on Devices in iTunes
While in iTunes, (12.1) Mac Version, I can barely see the column separators, and I rely on my cursor hovering to find them. When in my Music Library, and if I click on the right hand side to songs, I still have my adjustable sliders. When I plug in any device, and click on the device in the top left corner of iTunes, I get the "On My Device" choice in the Menu. When I click on Music on my device, the default size column appears, and seems to have NO WAY to adjust the width on the columns anymore. I have the cursor showing up and down in the divider from the artists into the grey menu bar, but nothing moves, even with this cursor. I have played with this for approximately 30 minutes, and am ready to pull out the remainder of my hair. I just want to read artists and titles on my Apple devices with the ease of previous iterations of iTunes, or even with the clarity of the older systems of the eighties and nineties. Adjusting your own input SHOULD NOT BE SO DIFFICULT. Please, some one let me know WHAT I AM DOING WRONG.
How can I adjust my columns to read what is on my devices?
iMac, OS X Yosemite (10.10.2)