The SPI chip select pins are a special and somewhat complicated case.
The pins labeled as chip selects are the special ones which can be automatically controlled by the SPI hardware. Only a very small number of libraries actually use the hardware chip select feature. For most cases, little to no actual speedup results from hardware CS control (and in some cases the added complexity of using the hardware feature can end up slower that just using GPIO to control the CS pin). Almost all libraries just use digitalWrite or direct GPIO registers, so any digital pin can be used with normal SPI code. These no need or advantage to using the special CS pins with all the normal SPI code out there.
However, some libraries like ILI9341_t3 do use this special SPI hardware feature (together with the FIFO) for a very dramatic speedup. ILI9341_t3 actually uses 2 of those pins, one for the CS signal and another for the display's DC signal. So with ILI9341_t3, you're limited to connecting those 2 signal to any of the CS0 pins.
To make matters even more complicated, there are actually alternate pins for the CS0 signals. We tried showing those on the early versions of the Teensy 3.0 reference card. But it was just complicated. The 5 CS0 pins would more properly be called actually CS0_0, CS0_1, CS0_2, CS0_3, CS0_4. There are alternates for CS0_0, CS0_1, CS0_2, CS0_3. But if you're using a library like ILI9341_t3, nothing will work if you connect to CS0_0 and the alternate pin for CS0_0, because it depends on using two *different* CS0 pins. Likewise for the very unlikely case where you find two different libraries both using the special CS hardware feature. Trying to show both the SPI port number and also which of the special pins within each port gets to be too much complex information to pack onto that small card, especially for a hardware feature that isn't actually used by nearly all the SPI programs and libraries.
Showing only the primary hardware-enabled pins works out pretty well. The common usage model for SPI is 3 signals shared by all SPI chips on the same bus, and then a dedicated control signal for each chip. The card shows you can connect 5 such signals, implying up to 5 SPI chips on the bus, and it guides people to use the chips which can be controlled by hardware, even though very few libraries actually make use of that hardware feature.
If you *really* want to dig into the finer details, the signal mux chapter (chapter 11 starting on page 181) in the
reference manual has much more detail about the capability of every pin. You can use the
schematic to translate between the Arduino pin numbers of Freescale's native names which appear in the reference manual. The pinout card shows only a subset, which fits onto the card and fits within the simplified model of hardware that people understand from Arduino.