diff --git a/README.md b/README.md
index d6b265e..c346ff7 100644
--- a/README.md
+++ b/README.md
@@ -625,6 +625,13 @@ and the current service signals to transmit a Slideshow, the Slideshow
 window is displayed. It shows a slide after it has been received
 completely and without errors.
 
+While the next slide is being received, a progress bar at the bottom of
+the Slideshow window shows the fraction that has successfully been
+received so far. It is always updated after a new segment has arrived
+free from error. The first segments of the initial slide usually are
+received before the corresponding header comes by. In this case a
+pulsing bar is shown until the header is available.
+
 Currently the following limitations apply:
 
 * slideshows in a separate sub-channel are not supported (just X-PAD);
@@ -640,7 +647,7 @@ This software is licensed under the GNU General Public License Version 3
 *Please note that the included FEC lib by KA9Q has a separate license!*
 
 DABlin - capital DAB experience
-Copyright (C) 2015-2021 Stefan Pöschel
+Copyright (C) 2015-2022 Stefan Pöschel
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
diff --git a/src/dablin_gtk.cpp b/src/dablin_gtk.cpp
index 5590483..61d497c 100644
--- a/src/dablin_gtk.cpp
+++ b/src/dablin_gtk.cpp
@@ -1,6 +1,6 @@
 /*
     DABlin - capital DAB experience
-    Copyright (C) 2015-2021 Stefan Pöschel
+    Copyright (C) 2015-2022 Stefan Pöschel
 
     This program is free software: you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
@@ -264,6 +264,7 @@ DABlinGTK::DABlinGTK(DABlinGTKOptions options) {
 	fic_change_service.GetDispatcher().connect(sigc::mem_fun(*this, &DABlinGTK::FICChangeServiceEmitted));
 	pad_change_dynamic_label.GetDispatcher().connect(sigc::mem_fun(*this, &DABlinGTK::PADChangeDynamicLabelEmitted));
 	pad_change_slide.GetDispatcher().connect(sigc::mem_fun(*this, &DABlinGTK::PADChangeSlideEmitted));
+	pad_file_progress.GetDispatcher().connect(sigc::mem_fun(*this, &DABlinGTK::PADFileProgressEmitted));
 	do_rec_status_update.GetDispatcher().connect(sigc::mem_fun(*this, &DABlinGTK::DoRecStatusUpdateEmitted));
 	do_datetime_sync.GetDispatcher().connect(sigc::mem_fun(*this, &DABlinGTK::DoDateTimeSyncEmitted));
 	do_datetime_update.GetDispatcher().connect(sigc::mem_fun(*this, &DABlinGTK::DoDateTimeUpdateEmitted));
@@ -1338,6 +1339,12 @@ void DABlinGTK::PADChangeSlideEmitted() {
 		slideshow_window.TryToShow();
 }
 
+void DABlinGTK::PADFileProgressEmitted() {
+//	fprintf(stderr, "### PADFileProgressEmitted\n");
+
+	slideshow_window.UpdateFileProgress(pad_file_progress.Pop());
+}
+
 void DABlinGTK::PADLengthError(size_t /*announced_xpad_len*/, size_t /*xpad_len*/) {
 	fprintf(stderr, "\x1B[31m" "[X-PAD len]" "\x1B[0m" " ");
 }
diff --git a/src/dablin_gtk.h b/src/dablin_gtk.h
index 0db164f..ac6275d 100644
--- a/src/dablin_gtk.h
+++ b/src/dablin_gtk.h
@@ -1,6 +1,6 @@
 /*
     DABlin - capital DAB experience
-    Copyright (C) 2015-2021 Stefan Pöschel
+    Copyright (C) 2015-2022 Stefan Pöschel
 
     This program is free software: you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
@@ -326,6 +326,10 @@ class DABlinGTK : public Gtk::Window, EnsembleSourceObserver, EnsemblePlayerObse
 	void PADChangeSlide(const MOT_FILE& slide) {pad_change_slide.PushAndEmit(slide);}
 	void PADChangeSlideEmitted();
 
+	GTKDispatcherQueue<double> pad_file_progress;
+	void PADFileProgress(const double fraction) {pad_file_progress.PushAndEmit(fraction);}
+	void PADFileProgressEmitted();
+
 	void PADLengthError(size_t announced_xpad_len, size_t xpad_len);
 public:
 	DABlinGTK(DABlinGTKOptions options);
diff --git a/src/dablin_gtk_sls.cpp b/src/dablin_gtk_sls.cpp
index de3f430..49d7e59 100644
--- a/src/dablin_gtk_sls.cpp
+++ b/src/dablin_gtk_sls.cpp
@@ -1,6 +1,6 @@
 /*
     DABlin - capital DAB experience
-    Copyright (C) 2018-2021 Stefan Pöschel
+    Copyright (C) 2018-2022 Stefan Pöschel
 
     This program is free software: you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
@@ -36,6 +36,7 @@ DABlinGTKSlideshowWindow::DABlinGTKSlideshowWindow() {
 
 	top_grid.attach(image, 0, 0, 1, 1);
 	top_grid.attach_next_to(link_button, image, Gtk::POS_BOTTOM, 1, 1);
+	top_grid.attach_next_to(progress_file, link_button, Gtk::POS_BOTTOM, 1, 1);
 
 	show_all_children();
 
@@ -98,6 +99,7 @@ void DABlinGTKSlideshowWindow::AwaitSlide() {
 	image.set_tooltip_text("Waiting for slide...");
 
 	link_button.hide();
+	progress_file.hide();
 }
 
 void DABlinGTKSlideshowWindow::UpdateSlide(const MOT_FILE& slide) {
@@ -153,4 +155,16 @@ void DABlinGTKSlideshowWindow::UpdateSlide(const MOT_FILE& slide) {
 	} else {
 		link_button.hide();
 	}
+
+	// hide file progress
+	progress_file.hide();
+}
+
+void DABlinGTKSlideshowWindow::UpdateFileProgress(const double fraction) {
+	// update/show file progress
+	if(fraction == -1)
+		progress_file.pulse();	// unknown progress
+	else
+		progress_file.set_fraction(fraction);
+	progress_file.show();
 }
diff --git a/src/dablin_gtk_sls.h b/src/dablin_gtk_sls.h
index 2ab8431..008045e 100644
--- a/src/dablin_gtk_sls.h
+++ b/src/dablin_gtk_sls.h
@@ -1,6 +1,6 @@
 /*
     DABlin - capital DAB experience
-    Copyright (C) 2018-2021 Stefan Pöschel
+    Copyright (C) 2018-2022 Stefan Pöschel
 
     This program is free software: you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
@@ -33,6 +33,7 @@ class DABlinGTKSlideshowWindow : public Gtk::Window {
 	Gtk::Grid top_grid;
 	Gtk::Image image;
 	Gtk::LinkButton link_button;
+	Gtk::ProgressBar progress_file;
 
 	Glib::RefPtr<Gdk::Pixbuf> pixbuf_waiting;
 	int prev_parent_x;
@@ -47,6 +48,7 @@ class DABlinGTKSlideshowWindow : public Gtk::Window {
 
 	void AwaitSlide();
 	void UpdateSlide(const MOT_FILE& slide);
+	void UpdateFileProgress(const double fraction);
 	void ClearSlide() {image.clear();}
 	bool IsEmptySlide() {return image.get_storage_type() == Gtk::ImageType::IMAGE_EMPTY;}
 };
diff --git a/src/mot_manager.cpp b/src/mot_manager.cpp
index 2ad912d..abc4d81 100644
--- a/src/mot_manager.cpp
+++ b/src/mot_manager.cpp
@@ -196,7 +196,7 @@ bool MOTObject::IsToBeShown() {
 	// abort, if incomplete/not yet triggered
 	if(!header_received)
 		return false;
-	if(!body.IsFinished() || result_file.body_size != body.GetSize())
+	if(!body.IsFinished() || GetCurrentBodySize() != GetTotalBodySize())
 		return false;
 	if(!result_file.trigger_time_now)
 		return false;
@@ -298,7 +298,7 @@ void MOTManager::HandleMOTDataGroup(const std::vector<uint8_t>& dg) {
 		return;
 
 
-	// add segment to MOT object (reset if necessary)
+	// add completed segment to MOT object (reset if necessary)
 	if(current_transport_id != transport_id) {
 		current_transport_id = transport_id;
 		object = MOTObject();
@@ -307,8 +307,19 @@ void MOTManager::HandleMOTDataGroup(const std::vector<uint8_t>& dg) {
 
 	// check if object shall be shown
 	bool display = object.IsToBeShown();
-//	fprintf(stderr, "dg_type: %d, seg_number: %2d%s, transport_id: %5d, size: %4zu; display: %s\n",
-//			dg_type, seg_number, last_seg ? " (LAST)" : "", transport_id, seg_size, display ? "true" : "false");
+
+	// derive progress fraction (-1 = unknown, as header not yet received - but body segments)
+	double fraction = object.GetTotalBodySize() ? (double) object.GetCurrentBodySize() / (double) object.GetTotalBodySize() : -1;
+
+//	fprintf(stderr, "dg_type: %d, seg_number: %2d%s, transport_id: %5d, seg_size: %4zu; display: %s, curr/total body size: %5zu/%5zu, fraction: %f\n",
+//			dg_type, seg_number, last_seg ? " (LAST)" : "", transport_id, seg_size, display ? "true" : "false", object.GetCurrentBodySize(), object.GetTotalBodySize(), fraction);
+
+	/* update progress
+	 * - if unknown, update invoked for each segment for visible pulse()!
+	 * - if complete, only update when shown
+	 */
+	if(!(fraction == 1 && !display))
+		observer->MOTFileProgress(fraction);
 
 	// if object shall be shown, forward it
 	if(display)
diff --git a/src/mot_manager.h b/src/mot_manager.h
index 905cd0d..11e5aab 100644
--- a/src/mot_manager.h
+++ b/src/mot_manager.h
@@ -52,7 +52,7 @@ struct MOT_FILE {
 	static const int CONTENT_SUB_TYPE_HEADER_UPDATE	= 0x000;
 
 	MOT_FILE() :
-		body_size(-1),
+		body_size(0),
 		content_type(-1),
 		content_sub_type(-1),
 		trigger_time_now(false)
@@ -101,6 +101,9 @@ class MOTObject {
 	void AddSeg(bool dg_type_header, int seg_number, bool last_seg, const uint8_t* data, size_t len);
 	bool IsToBeShown();
 	MOT_FILE GetFile() {return result_file;}
+
+	size_t GetCurrentBodySize() {return body.GetSize();}
+	size_t GetTotalBodySize() {return result_file.body_size;}
 };
 
 
@@ -110,6 +113,7 @@ class MOTManagerObserver {
 	virtual ~MOTManagerObserver() {}
 
 	virtual void MOTFileCompleted(const MOT_FILE& /*file*/) {}
+	virtual void MOTFileProgress(const double /*fraction*/) {}
 };
 
 
diff --git a/src/pad_decoder.h b/src/pad_decoder.h
index 2c1cb8a..0f5bd5d 100644
--- a/src/pad_decoder.h
+++ b/src/pad_decoder.h
@@ -205,6 +205,7 @@ class PADDecoderObserver {
 
 	virtual void PADChangeDynamicLabel(const DL_STATE& /*dl*/) {}
 	virtual void PADChangeSlide(const MOT_FILE& /*slide*/) {}
+	virtual void PADFileProgress(const double /*fraction*/) {}
 
 	virtual void PADLengthError(size_t /*announced_xpad_len*/, size_t /*xpad_len*/) {}
 };
@@ -226,6 +227,7 @@ class PADDecoder : public MOTManagerObserver {
 	MOTManager *mot_manager;
 
 	void MOTFileCompleted(const MOT_FILE& file);
+	void MOTFileProgress(const double fraction) {observer->PADFileProgress(fraction);}
 public:
 	PADDecoder(PADDecoderObserver *observer, bool loose);
 	~PADDecoder();