I would like to be able to enable on the fly transformation in version 3, I have followed the user guide instructions but I seem to be missing the options in the 'Options' window to allow this. In the version 3 user guide the following instructions are given to enable the 'enable on the fly transformation' to be seen in the Project CRS window. This screenshot shows the image of the 'Options' window in the user guide.
here are three ways to enable On The Fly CRS Transformation:
Select Project Properties ‣ CRS from the Project ( or Settings) menu. You can then activate the checkbox Enable on the fly CRS transformation (OTF) checkbox in the CRS tab and select the CRS to use (see Coordinate Reference System Selector)
Click on the geographic CRS status icon in the lower right-hand corner of the status bar, leading you to the previous dialog.
Turn OTF on by default in the CRS tab of the Settings ‣ Options dialog by selecting checkbox Enable ‘on the fly’ reprojection by default or Automatically enable ‘on the fly’ reprojection if layers have different CRS.