Add correlation marker modes

www/ui/options.js

@@ -271,6 +271,7 @@ function syncUI() {
     ['opt_rmsColWarn', CONFIG.RMS_COLOR_WARN],
 
     ['opt_corrResponse', String(Number(CONFIG.CORR_RESPONSE_S) >= 1.75 ? 2.5 : 1)],
+    ['opt_corrNegativeMarkerMode', CONFIG.CORR_NEGATIVE_MARKER_MODE || 'memory'],
     ['opt_xyPoints', String(CONFIG.XY_POINTS)],
     ['opt_xyStyle', CONFIG.XY_STYLE],
     ['opt_xySilenceGate', CONFIG.XY_SILENCE_GATE_ENABLED, null, null, 'checkbox'],
@@ -929,6 +930,13 @@ function wireHandlers(env) {
     try { env?.notifyRtaConfig?.(); } catch (_) {}
     return String(CONFIG.CORR_RESPONSE_S);
   });
+  h('opt_corrNegativeMarkerMode', v => {
+    const mode = String(v || '').toLowerCase();
+    CONFIG.CORR_NEGATIVE_MARKER_MODE = ['memory', 'hold', 'off'].includes(mode)
+      ? mode
+      : 'memory';
+    return CONFIG.CORR_NEGATIVE_MARKER_MODE;
+  });
   const corrResetPeak = E('opt_corrResetPeak');
   if (corrResetPeak) corrResetPeak.onclick = () => {
     CONFIG.CORR_RESET_TOKEN = Math.max(0, Math.floor(Number(CONFIG.CORR_RESET_TOKEN) || 0)) + 1;