Index: usr.sbin/gstat/gstat.8
===================================================================
--- usr.sbin/gstat/gstat.8
+++ usr.sbin/gstat/gstat.8
@@ -24,7 +24,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd January 1, 2021
+.Dd September 25, 2021
 .Dt GSTAT 8
 .Os
 .Sh NAME
@@ -98,10 +98,13 @@
 Only display physical providers (those with rank of 1).
 .El
 .Sh INTERACTIVE COMMANDS
-These commands are currently recognized if
+All command line arguments except -bBCI work interactively.
+These commands are recognized if
 .Nm
 is not running in batch mode:
 .Bl -tag -width indent
+.It Ic ?
+Display a summary of the commands
 .It Ic <
 Halve the update interval.
 .It Ic >
Index: usr.sbin/gstat/gstat.c
===================================================================
--- usr.sbin/gstat/gstat.c
+++ usr.sbin/gstat/gstat.c
@@ -93,6 +93,7 @@
 	char *p;
 	char f_s[100], pf_s[100], tmp_f_s[100];
 	char ts[100], g_name[4096];
+	char ch;
 	const char *line;
 	long double ld[16];
 	uint64_t u64;
@@ -539,9 +540,15 @@
 				if (flag_I < 1000)
 					flag_I = 1000;
 				break;
+			case 'a':
+				flag_a = !flag_a;
+				break;
 			case 'c':
 				flag_c = !flag_c;
 				break;
+			case 'd':
+				flag_d = !flag_d;
+				break;
 			case 'f':
 				move(0,0);
 				clrtoeol();
@@ -578,9 +585,38 @@
 			case 'F':
 				f_s[0] = '\0';
 				break;
+			case 'o':
+				flag_o = !flag_o;
+				break;
+			case 'p':
+				flag_p = !flag_p;
+				break;
 			case 'q':
 				quit = 1;
 				break;
+			case 's':
+				flag_s = !flag_s;
+				break;
+			case '?':
+				move(0,0);
+				clear();
+				printw("Interactive Commands:\n");
+				printw("<\t- Halve update interval\n");
+				printw(">\t- Double update interval\n");
+				printw("a\t- Show providers that are at least 0.1%% busy\n");
+				printw("c\t- Show geom(4) consumers\n");
+				printw("d\t- Show statistics for delete operations\n");
+				printw("f\t- Filter device names matching regular expression\n");
+				printw("F\t- Remove device name filter\n");
+				printw("o\t- Show statistics for all other operations\n");
+				printw("s\t- Show block size statistics\n");
+				printw("p\t- Show only physical providers\n");
+				printw("q\t- Quit\n");
+				printw("?\t- Show this help text\n");
+				printw("Hit any key to continue:\n");
+				refresh();
+				read(0, &ch, 1);
+				break;
 			default:
 				break;
 			}