Add usage example of tibt; FAQ about [arg1]

commands/index.rst

@@ -6,6 +6,7 @@ This is the documentation of x64dbg commands.
 FAQ:
 
 - Please note that all integer constants are represented in hex. For example, after executing the following command, ``$i`` will be 256 (0x100): ``mov $i, 100`` . This also means a variable cannot begin with letters from A to F.
+- Throughout this documentation, ``[arg1]`` (argument with a square bracket) represents an optional argument. ``arg1`` (argument without a square bracket) represents an mandatory argument. "[" and "]" represent memory reference operation in expression evaluation for the argument. If you don't want to refer to the content in the memory pointer, don't add "[" and "]".
 - For commands with two or more arguments, a comma (,) is used to separate these arguments. Do not use a space to separate the arguments.
 - x64dbg only supports integer in expressions. Strings, Floating point numbers and SSE/AVX data is not supported. Therefore you cannot use ``[eax]=="abcd"`` operator to compare strings. Instead, you can compare the first DWORD/QWORD of the string, or use an appropriate plugin which provides such feature.
 - The "==" operator is used to test if both operands are equal. The "=" operator is used to transfer the value of the expression to the destination.

commands/tracing/TraceIntoBeyondTraceRecord.md

@@ -1,6 +1,9 @@
 # TraceIntoBeyondTraceRecord/tibt
 
-Perform [StepInto](StepInto.md) until the program reaches somewhere outside the trace record.
+Perform [StepInto](StepInto.md) until the program reaches somewhere outside the trace record. This is similar to `ticnd tr.hitcount(cip)==0&&arg1, arg2` except that it achieves higher performance by avoiding the expression function invocation.
+
+Usage example: If you want to find out the forking point of the program when different inputs are provided, first enable or re-enable trace record to clean trace record data.
+Then you trace while input A is provided. Finally you provide input B and execute `TraceIntoBeyondTraceRecord` command. The program will be paused where the instruction is never executed before.
 
 ## arguments