After logging into XTS, Market watch window will appear. Hover the cursor on script's Menu bar and Right click and Reposition columns. Right side options are already existing option in market watch and left side are already available for spares. Move the options from Right side to left side by ing the options and clicking the left side double arrow mark. Keep the options you want in right side and move rest of the options to left side. Click Ok and give Ctrl+M to save the Market watch window. If you want to fit the columns as per your need, Try "Fit to Window", "Fit to Data", "Fit to Header" options by right-clicking the script menu bar.
columns, Market watch, reposition