Some improvements.

app.py

@@ -224,13 +224,14 @@ def download(request:      gradio.Request,
       else:
          outputLeads = [ 'I', 'II', 'V1', 'V2', 'V3', 'V4' , 'V5' , 'V6' ]
 
-      deepfakeecg.dataToPDF(ecgResult, ecgType, outputLeads, fileName,
-                           Sessions[request.session_hash].Selected + 1,
-                           outputFormat)
+      deepfakeecg.dataToPDF(ecgResult, ecgType, outputLeads, fileName, outputFormat,
+                            Sessions[request.session_hash].Selected + 1)
 
       log(f'Session "{request.session_hash}": Download PDF file {fileName}')
       return fileName
 
+   return None
+
 
 # ###### Download CSV #######################################################
 def downloadCSV(request: gradio.Request) -> pathlib.Path:
@@ -426,12 +427,9 @@ with gradio.Blocks(css = css, theme = gradio.themes.Glass(secondary_hue=gradio.t
    # gradio.Markdown('## Output')
 
    with gradio.Row(): # height = '24vh', min_height = '24vh', max_height = '24vh'):
-      analysisOutput = gradio.Plot(label = 'Analysis')
-
-   with gradio.Row(): # height = '24vh', min_height = '24vh', max_height = '24vh'):
-      outputGallery = gradio.Gallery(label         = 'ECG',
+      outputGallery = gradio.Gallery(label         = 'Generated ECGs',
                                      columns       = 8,
-                                     rows          = 1,
+                                     # rows          = 1,
                                      height        = 'auto',
                                      object_fit    = 'contain',
                                      show_label    = True,
@@ -439,6 +437,9 @@ with gradio.Blocks(css = css, theme = gradio.themes.Glass(secondary_hue=gradio.t
                                      preview       = False
                                     )
 
+   with gradio.Row(): # height = '24vh', min_height = '24vh', max_height = '24vh'):
+      analysisOutput = gradio.Plot(label = 'Analysis')
+
    # ====== Add click event handling for "Generate" button ==================
    buttonGenerate.click(predict,
                         inputs  = [ sliderNumberOfECGs,
@@ -457,19 +458,16 @@ with gradio.Blocks(css = css, theme = gradio.themes.Glass(secondary_hue=gradio.t
    # ====== Add click event handling for download buttons ===================
    # Using hidden button and JavaScript, to generate download file on-the-fly:
    # https://github.com/gradio-app/gradio/issues/9230#issuecomment-2323771634
-   buttonCSV.click(downloadCSV)
    buttonCSV.click(fn      = downloadCSV,
                    inputs  = None,
                    outputs = [ buttonCSV_hidden ]).then(
                       fn = None, inputs = None, outputs = None,
                       js = "() => document.querySelector('#download_csv_hidden').click()")
-   buttonPDF.click(downloadPDF)
    buttonPDF.click(fn      = downloadPDF,
                    inputs  = None,
                    outputs = [ buttonPDF_hidden ]).then(
                       fn = None, inputs = None, outputs = None,
                       js = "() => document.querySelector('#download_pdf_hidden').click()")
-   buttonPDFwAnalysis.click(downloadPDFwithAnalysis)
    buttonPDFwAnalysis.click(fn      = downloadPDFwithAnalysis,
                             inputs  = None,
                             outputs = [ buttonPDFwAnalysis_hidden ]).then(