Hello everyone, I am using QT to design my GUI with ROS. At beginning, when I run my code, the window is shown as following:

http://images2015.cnblogs.com/blog/1001667/201612/1001667-20161221032040839-1490518329.png

However, I closed the command panel section by mistake. After that, I cannot open it again and I cannot find where to open it. My window only has ROS communications section.

Does someone know how to solve it ? Any idea is appreciate.

Thanks in advance