Preserve Case Replace in Sublime Text 3

Question

From having done a bit of googling on this it seems that it is or at least was possible to do this with Sublime Text. I have seen multiple references to a preserve case button in the find and replace pane which looks like 2 rounded squares superimposed on each other.

However, I can't find this at all in my version of Sublime Text 3 (on Mavericks)...

Also I checked preferences to see if this option was somehow turned off but the only reference I could find to it was:

{ "keys": ["super+alt+a"], "command": "toggle_preserve_case", "context":
    [
        { "key": "setting.is_widget", "operator": "equal", "operand": true }
    ]
},

in the default key map file...

Here is a screenshot of my find and replace pane:

Answer 1

In the latest Sublime 3 build (3059) there is a dedicated icon in the replace dialog to preserve the case. When toggling it and using the input shown in the screenshot, the following input string will be converted to the following output:

Input: "Xhis is my xest."

Output: "This is my test."