So, I recently started using my android phone in simplified Chinese mode, to help myself internalize Chinese characters. In my browser window, when I press down on a URL, the "在新标签页中打开" button allows me to open a new tab.
So I tried to translate the sentence literally by dictionary definitions, and I came up with this:
在新标签页中打开: In new tab page, middle open.
So why is the 中(middle) necessary? Without it, the sentence makes sense to me. Could it be functioning as a preposition? If so, then why would I need both 中 and 在 in this sentence?