diff --git a/Threads.md b/Threads.md
index 89a57f1..be752d3 100644
--- a/Threads.md
+++ b/Threads.md
@@ -6,28 +6,41 @@ Optimal number of threads depends on the size of the L3 cache of CPU.
 ## Options
 By default, XMRig try choice optimal threads settings for current CPU with very estimated maximum CPU load 75% (`--max-cpu-usage=75`).
 
+###  Algorithm 
 ```
 -a, --algo=ALGO       cryptonight (default) or cryptonight-lite
 ```
 If you want use CryptoNight-Lite (AEON) you should specify this option `--algo=cryptonight-lite`. For cryptonight (Monero) it's option optional.
 
+### Threads count
 ```
 -t, --threads=N       number of miner threads
 ```
 Manually specified number of threads. With `--safe` option this number can be automatically reduced to not to exceed the optimal thread count.
 
+### Algorithm variation
 ```
 -v, --av=N            algorithm variation, 0 auto select\n\
 ```
+* `--av=1` For CPUs with hardware AES.
+* `--av=2` Lower power mode (double hash) of `1`.
+* `--av=3` Software AES implementation.
+* `--av=4` Lower power mode (double hash) of `3`.
 
+With `--safe` option you can not select AES variations if your CPU not support AES-NI. It will be adjusted to software AES variation.
+
+### Affinity
 ```
     --cpu-affinity    set process affinity to cpu core(s), mask 0x3 for cores 0 and 1
 ```
 
+### Maximum cpu usage
 ```
     --max-cpu-usage=N maximum cpu usage for automatic threads mode (default 75)\n\
 ```
+It's very estimated maximum CPU usage for auto mode. For example 3 threads of 4, it's about 75%. 
 
+### Safe mode
 ```
     --safe            safe adjust threads and av settings for current CPU
 ```