Step 1: Open the Word document containing the text box border that you want to remove. Step 2: Right-click the text box, then click Format Text Box. Step 3: Click the Colors and Lines tab at the top of the window.Step 4: Click the drop-down menu to the right of Color in the Line section of the window, then click the No Color option.Step 5: Click the OK button at the bottom of the window.tep 2: Right-click the text box, then click Format Text Box. Step 3: Click the Colors and Lines tab at the top of the window. Step 4: Click the drop-down menu to the right of Color in the Line section of the window, then click the No Color option. Step 5: Click the OK button at the bottom of the window.