diff --git a/src/pdf_jam.cpp b/src/pdf_jam.cpp
index 6f5d0c3..1db2bfd 100644
--- a/src/pdf_jam.cpp
+++ b/src/pdf_jam.cpp
@@ -23,15 +23,60 @@ void PDFJam::pushCommand(QString cmd) {
   if(!isRunning()) start();
 }
 
-void PDFJam::loadFile(QString fileName, int fileNum, int numPages) {
+/* Rotate PDF page clockwise. */
+bool PDFJam::rotatePage(int fileIndex, int rotatedPageIndex, int degree) {
+  if((degree != 90) && (degree != 180) && (degree != 270)) {
+    return false;
+  }
+
+  QString rtTmp = "pdf%1 /tmp/hpdf/%2/%3.pdf -- outfile /tmp/hpdf/%4/%5.pdf ";
+  QString cmd = rtTmp.arg(QString::number(degree)).arg(QString::number(fileIndex))
+                .arg(QString::number(rotatedPageIndex)).arg(QString::number(fileIndex))
+                .arg(QString::number(rotatedPageIndex));
+  pushCommand(cmd);
+}
+
+/* Remove page in a pdf file. */
+bool PDFJam::removePage(int fileIndex, int numPages, int deletedPageIndex) {
+  if((deletedPageIndex < 0) || (deletedPageIndex >= numPages)) {
+    return false;
+  }
+  /*QString tmp = "file1.pdf '-' file2.pdf '1,2' file3.pdf '2-2' --outfile output.pdf"*/
+  QString rmTmp = "rm /tmp/hpdf/%1/%2.pdf ";
+  QString cmd   = rmTmp.arg(QString::number(fileIndex)).arg(QString::number(deletedPageIndex));
+  QString tmp   = "mv /tmp/hpdf/%1/%2.pdf /tmp/hpdf/%3/%4.pdf ";
+
+  for(int i = deletedPageIndex+1; i < numPages; i++) {
+    cmd += "&& " + tmp.arg(QString::number(fileIndex)).arg(QString::number(i))
+                          .arg(QString::number(fileIndex)).arg(QString::number(i-1));
+  }
+
+  pushCommand(cmd);
+}
+
+/* Export file number 'fileIndex' to destination. */
+void PDFJam::exportFile(int fileIndex, int numPages, QString dst) {
+  QString cmd = "pdfjam ";
+  QString tmp = "/tmp/hpdf/%1/%2.pdf '-' ";
+
+  for(int i = 0; i < numPages; i++) {
+    cmd += tmp.arg(QString::number(fileIndex)).arg(QString::number(i));
+  }
+
+  QString outTmp = "--outfile %1";
+  cmd += outTmp.arg(dst);
+  pushCommand(cmd);
+}
+
+void PDFJam::loadFile(QString fileName, int fileIndex, int numPages) {
   QString path = "/tmp/hpdf/%1/";
-  path = path.arg(QString::number(fileNum));
+  path = path.arg(QString::number(fileIndex));
   makeFolder(path);
 
   QString tmp = "pdfjam %1 %2 -- outfile %3%4.pdf";
   QString cmd = "";
-  for(int i = 1; i <= numPages; i++) {
-    cmd += tmp.arg(fileName).arg(QString::number(i)).arg(path).arg(QString::number(i)) + ";";
+  for(int i = 0; i <= numPages; i++) {
+    cmd += tmp.arg(fileName).arg(QString::number(i+1)).arg(path).arg(QString::number(i)) + ";";
   }
   pushCommand(cmd);
 }
@@ -58,7 +103,5 @@ void PDFJam::run(void) {
     else
       qDebug() << "SUCCESS: executed " << cmd;*/
   }
-
-  /*system("echo 'tata' > /tmp/test.txt");*/
 }
 
diff --git a/src/pdf_jam.h b/src/pdf_jam.h
index 57aa390..5334985 100644
--- a/src/pdf_jam.h
+++ b/src/pdf_jam.h
@@ -14,6 +14,9 @@ public:
 
   void pushCommand(QString);
   void loadFile(QString fileName, int, int);
+  void exportFile(int, int, QString);
+  bool removePage(int, int, int);
+  bool rotatePage(int, int, int);
   void makeFolder(QString);
 
 protected: