diff --git a/examples/main/main.cpp b/examples/main/main.cpp
index 718bb6029..fcf1af5b0 100644
--- a/examples/main/main.cpp
+++ b/examples/main/main.cpp
@@ -14,6 +14,7 @@
 #include <fstream>
 #include <iostream>
 #include <string>
+#include <sstream>
 #include <vector>
 
 #if defined (__unix__) || (defined (__APPLE__) && defined (__MACH__))
@@ -167,7 +168,7 @@ int main(int argc, char ** argv) {
     // in instruct mode, we inject a prefix and a suffix to each input by the user
     if (params.instruct) {
         params.interactive_start = true;
-        params.antiprompt.push_back("### Instruction:\n\n");
+        params.antiprompt.push_back("###");
     }
 
     // enable interactive mode if reverse prompt or interactive start is specified
@@ -438,8 +439,53 @@ int main(int argc, char ** argv) {
                     }
 
                     n_remain -= line_inp.size();
-                }
 
+                     // check buffer's first 3 chars equal '???' to enter command mode. 
+                    if (strncmp(buffer.c_str(), "???", 3) == 0 && buffer.length() > 3) {
+                        std::istringstream command(buffer);
+                        int j = 0; std::string test, arg, cmd;
+                        while (command>>test) {
+                            j++;
+                            if ( j == 2 ) {
+                                arg = test;
+                            }
+                            if ( j == 3 ) {
+                                cmd = test;
+                            }
+                        }
+                        if (arg == "-n" || arg == "--n_predict") {
+                            params.n_predict = std::stoi(cmd);
+                        } else if (arg == "--top_k") {
+                            params.top_k = std::stoi(cmd);
+                        } else if (arg == "-c" || arg == "--ctx_size") {
+                            params.n_ctx = std::stoi(cmd);
+                        } else if (arg == "--top_p") {
+                            params.top_p = std::stof(cmd);
+                        } else if (arg == "--temp") {
+                            params.temp = std::stof(cmd);
+                        } else if (arg == "--repeat_last_n") {
+                            params.repeat_last_n = std::stoi(cmd);
+                        } else if (arg == "--repeat_penalty") {
+                            params.repeat_penalty = std::stof(cmd);
+                        } else if (arg == "-b" || arg == "--batch_size") {
+                            params.n_batch = std::stoi(cmd);
+                            params.n_batch = std::min(512, params.n_batch);
+                        } else if (arg == "-r" || arg == "--reverse-prompt") {
+                            params.antiprompt.push_back(cmd);
+                        } else if (arg == "--keep") {
+                            params.n_keep = std::stoi(cmd);
+                        } else if (arg == "stats") {
+                            llama_print_timings(ctx);
+                        } else {
+                            printf("invalid argument parsed: %s\n", arg.c_str());
+                        }
+                        set_console_color(con_st, CONSOLE_COLOR_DEFAULT);
+                        printf("sampling: temp = %f, top_k = %d, top_p = %f, repeat_last_n = %i, repeat_penalty = %f\n",
+                                params.temp, params.top_k, params.top_p, params.repeat_last_n, params.repeat_penalty);
+                        printf("generate: n_ctx = %d, n_batch = %d, n_predict = %d, n_keep = %d\n", n_ctx, params.n_batch, params.n_predict, params.n_keep);
+                    }
+                }
+                
                 input_noecho = true; // do not echo this again
             }