diff --git a/src/imageselector.cpp b/src/imageselector.cpp
index e84b9a5..c2f7306 100644
--- a/src/imageselector.cpp
+++ b/src/imageselector.cpp
@@ -12,8 +12,8 @@
 #include <algorithm>    // std::shuffle
 #include <random>       // std::default_random_engine
 
-ImageSelector::ImageSelector(std::unique_ptr<PathTraverser>& pathTraverser, char aspect):
-  pathTraverser(pathTraverser), _aspect(aspect)
+ImageSelector::ImageSelector(std::unique_ptr<PathTraverser>& pathTraverser, char aspectIn):
+  pathTraverser(pathTraverser), aspect(aspectIn)
 {
 }
 
@@ -61,7 +61,7 @@ bool ImageSelector::imageValidForAspect(const std::string &fileName)
     std::swap(imageWidth,imageHeight);
   }
 
-  switch(_aspect)
+  switch(aspect)
   {
     case 'a':
       // allow all
@@ -118,7 +118,7 @@ std::string RandomImageSelector::getNextImage()
 
 unsigned int RandomImageSelector::selectRandom(const QStringList& images) const
 {
-  if(_debugMode)
+  if(debugMode)
   {
     std::cout << "images: " << images.size() << std::endl;
   }
diff --git a/src/imageselector.h b/src/imageselector.h
index a11c8c9..645f5af 100644
--- a/src/imageselector.h
+++ b/src/imageselector.h
@@ -11,17 +11,17 @@ class PathTraverser;
 class ImageSelector
 {
 public:
-    ImageSelector(std::unique_ptr<PathTraverser>& pathTraverser, char aspect);
+    ImageSelector(std::unique_ptr<PathTraverser>& pathTraverser, char aspectIn);
     virtual ~ImageSelector();
     virtual std::string getNextImage() = 0;
-    void setDebugMode(bool debugMode) { _debugMode = debugMode;}
+    void setDebugMode(bool debugModeIn) { debugMode = debugModeIn;}
 
 protected:
     int getImageRotation(const std::string &fileName);
     bool imageValidForAspect(const std::string &fileName);
     std::unique_ptr<PathTraverser>& pathTraverser;
-    char _aspect;
-    bool _debugMode = false;
+    char aspect;
+    bool debugMode = false;
 };
 
 class RandomImageSelector : public ImageSelector
diff --git a/src/mainwindow.cpp b/src/mainwindow.cpp
index f283ffb..804a212 100644
--- a/src/mainwindow.cpp
+++ b/src/mainwindow.cpp
@@ -109,7 +109,7 @@ void MainWindow::updateImage(bool immediately)
     }
 
     QPixmap p( currentImage.c_str() );
-    if(_debugMode)
+    if(debugMode)
     {
       std::cout << "size:" << p.width() << "x" << p.height() << std::endl;
     }
@@ -125,7 +125,7 @@ void MainWindow::updateImage(bool immediately)
       drawText(background, overlay->getMarginTopRight(), overlay->getFontsizeTopRight(), overlay->getRenderedTopRight(currentImage).c_str(), Qt::AlignTop|Qt::AlignRight);
       drawText(background, overlay->getMarginBottomLeft(), overlay->getFontsizeBottomLeft(), overlay->getRenderedBottomLeft(currentImage).c_str(), Qt::AlignBottom|Qt::AlignLeft);
       drawText(background, overlay->getMarginBottomRight(), overlay->getFontsizeBottomRight(), overlay->getRenderedBottomRight(currentImage).c_str(), Qt::AlignBottom|Qt::AlignRight);
-      if (_debugMode)
+      if (debugMode)
       {
         // draw a thumbnail version of the source image in the bottom left, to check for cropping issues
         QPainter pt(&background);
@@ -184,14 +184,14 @@ void MainWindow::setOverlay(Overlay* o)
   overlay = o;
 }
 
-void MainWindow::setAspect(char aspect)
+void MainWindow::setAspect(char aspectIn)
 {
-  _aspect = aspect;
+  aspect = aspectIn;
 }
 
 QPixmap MainWindow::getBlurredBackground(const QPixmap& originalSize, const QPixmap& scaled)
 {
-    if (scaled.width() < width() || _aspect == 'l') {
+    if (scaled.width() < width()) {
       QPixmap background = blur(originalSize.scaledToWidth(width(), Qt::SmoothTransformation));
       QRect rect(0, (background.height() - height())/2, width(), height());
       return background.copy(rect);
@@ -212,15 +212,15 @@ QPixmap MainWindow::getRotatedPixmap(const QPixmap& p)
 
 QPixmap MainWindow::getScaledPixmap(const QPixmap& p)
 {
-  if (_fitAspectAxisToWindow)
+  if (fitAspectAxisToWindow)
   {
-    if ( _aspect == 'p')
+    if ( aspect == 'p')
     {
       // potrait mode, make height of image fit screen and crop top/bottom
       QPixmap pTemp = p.scaledToHeight(height(), Qt::SmoothTransformation);
       return pTemp.copy(0,0,width(),height());
     }
-    else if ( _aspect == 'l')
+    else if ( aspect == 'l')
     {
       // landscape mode, make width of image fit screen and crop top/bottom
       QPixmap pTemp = p.scaledToWidth(width(), Qt::SmoothTransformation);
diff --git a/src/mainwindow.h b/src/mainwindow.h
index 9de5e9c..d83f436 100644
--- a/src/mainwindow.h
+++ b/src/mainwindow.h
@@ -25,18 +25,18 @@ public:
     void setBackgroundOpacity(unsigned int opacity);
     void warn(std::string text);
     void setOverlay(Overlay* overlay);
-    void setAspect(char aspect);
-    void setDebugMode(bool debugMode) {_debugMode = debugMode;}
-    void setFitAspectAxisToWindow(bool fitAspectAxisToWindow) { _fitAspectAxisToWindow = fitAspectAxisToWindow; }
+    void setAspect(char aspectIn);
+    void setDebugMode(bool debugModeIn) {debugMode = debugModeIn;}
+    void setFitAspectAxisToWindow(bool fitAspectAxisToWindowIn) { fitAspectAxisToWindow = fitAspectAxisToWindowIn; }
 private:
     Ui::MainWindow *ui;
 
     std::string currentImage;
     unsigned int blurRadius = 20;
     unsigned int backgroundOpacity = 150;
-    char _aspect = 'a';
-    bool _debugMode = false;
-    bool _fitAspectAxisToWindow = false;
+    char aspect = 'a';
+    bool debugMode = false;
+    bool fitAspectAxisToWindow = false;
 
     Overlay* overlay;
 
diff --git a/src/overlay.cpp b/src/overlay.cpp
index 94a2a68..9d43572 100644
--- a/src/overlay.cpp
+++ b/src/overlay.cpp
@@ -50,7 +50,7 @@ void Overlay::parseInput() {
 
 QString Overlay::getTemplate(QStringList components){
   if (components.size()>3) {
-    if(_debugMode)
+    if(debugMode)
     {
       std::cout << "template: " << components[3].toStdString() << std::endl;
     }
@@ -61,7 +61,7 @@ QString Overlay::getTemplate(QStringList components){
 
 int Overlay::getMargin(QStringList components){
   if (components.size()>1) {
-    if(_debugMode)
+    if(debugMode)
     {
       std::cout << "margin: " << components[1].toStdString() << std::endl;
     }
@@ -76,7 +76,7 @@ int Overlay::getMargin(QStringList components){
 
 int Overlay::getFontsize(QStringList components){
   if (components.size()>2) {
-    if(_debugMode)
+    if(debugMode)
     {
       std::cout << "fontsize: " << components[2].toStdString() << std::endl;
     }
diff --git a/src/overlay.h b/src/overlay.h
index 90800f2..b1cef0a 100644
--- a/src/overlay.h
+++ b/src/overlay.h
@@ -27,13 +27,13 @@ class Overlay
     int getMarginBottomRight();
     int getFontsizeBottomRight();
 
-    void setDebugMode(const bool debugMode) { _debugMode = debugMode; }
+    void setDebugMode(const bool debugModeIn) { debugMode = debugModeIn; }
 
   private:
     const std::string overlayInput;
     int margin;
     int fontsize;
-    bool _debugMode = false;
+    bool debugMode = false;
 
     QString topLeftTemplate;
     QString topRightTemplate;