diff --git a/examples/builtin_fonts.rs b/examples/builtin_fonts.rs
index e9f8fb6..4279317 100644
--- a/examples/builtin_fonts.rs
+++ b/examples/builtin_fonts.rs
@@ -18,6 +18,6 @@ fn main() {
     let text = "Lorem ipsum";
 
     let font = doc.add_builtin_font(BuiltinFont::TimesBoldItalic).unwrap();
-    current_layer.use_text(text, 48, Mm(10.0), Mm(200.0), &font);
+    current_layer.use_text(text, 48.0, Mm(10.0), Mm(200.0), &font);
     doc.save(&mut BufWriter::new(File::create("test_builtin_fonts.pdf").unwrap())).unwrap();
 }
diff --git a/examples/fonts.rs b/examples/fonts.rs
index 4b3636b..b887dd1 100644
--- a/examples/fonts.rs
+++ b/examples/fonts.rs
@@ -15,7 +15,7 @@ fn main() {
     let font = doc.add_external_font(&mut font_reader).unwrap();
 
     // `use_text` is a wrapper around making a simple string
-    current_layer.use_text(text, 48, Mm(10.0), Mm(200.0), &font);
+    current_layer.use_text(text, 48.0, Mm(10.0), Mm(200.0), &font);
 
     // text fill color = blue
     let blue = Rgb::new(13.0 / 256.0, 71.0 / 256.0, 161.0 / 256.0, None);
@@ -31,11 +31,11 @@ fn main() {
  
         // setup the general fonts.
         // see the docs for these functions for details
-        current_layer.set_font(&font, 33);
+        current_layer.set_font(&font, 33.0);
         current_layer.set_text_cursor(Mm(10.0), Mm(100.0));
-        current_layer.set_line_height(33);
-        current_layer.set_word_spacing(3000);
-        current_layer.set_character_spacing(10);
+        current_layer.set_line_height(33.0);
+        current_layer.set_word_spacing(3000.0);
+        current_layer.set_character_spacing(10.0);
 
         // write two lines (one line break)
         current_layer.write_text(text, &font);
@@ -44,14 +44,14 @@ fn main() {
         current_layer.add_line_break();
 
         current_layer.set_text_rendering_mode(TextRenderingMode::FillStroke);
-        current_layer.set_character_spacing(0);
+        current_layer.set_character_spacing(0.0);
         current_layer.set_text_matrix(TextMatrix::Rotate(10.0));
 
         // write one line, but write text2 in superscript
         current_layer.write_text(text, &font);
-        current_layer.set_line_offset(10);
+        current_layer.set_line_offset(10.0);
         current_layer.set_text_rendering_mode(TextRenderingMode::Stroke);
-        current_layer.set_font(&font, 18);
+        current_layer.set_font(&font, 18.0);
         current_layer.write_text(text2, &font);
 
     current_layer.end_text_section();
diff --git a/src/types/pdf_layer.rs b/src/types/pdf_layer.rs
index 86e737f..e95aded 100644
--- a/src/types/pdf_layer.rs
+++ b/src/types/pdf_layer.rs
@@ -124,7 +124,7 @@ impl PdfLayerReference {
     /// Set the current font, only valid in a `begin_text_section` to
     /// `end_text_section` block
     #[inline]
-    pub fn set_font(&self, font: &IndirectFontRef, font_size: i64)
+    pub fn set_font(&self, font: &IndirectFontRef, font_size: f64)
     -> ()
     {
         self.internal_add_operation(Operation::new("Tf",
@@ -317,9 +317,9 @@ impl PdfLayerReference {
     /// Sets the text line height inside a text block
     /// (must be called within `begin_text_block` and `end_text_block`)
     #[inline]
-    pub fn set_line_height(&self, height: i64) {
+    pub fn set_line_height(&self, height: f64) {
         self.internal_add_operation(Operation::new("TL",
-            vec![lopdf::Object::Integer(height)]
+            vec![lopdf::Object::Real(height)]
         ));
     }
 
@@ -327,9 +327,9 @@ impl PdfLayerReference {
     /// Values are given in points. A value of 3 (pt) will increase
     /// the spacing inside a word by 3pt.
     #[inline]
-    pub fn set_character_spacing(&self, spacing: i64) {
+    pub fn set_character_spacing(&self, spacing: f64) {
         self.internal_add_operation(Operation::new("Tc",
-            vec![lopdf::Object::Integer(spacing)]
+            vec![lopdf::Object::Real(spacing)]
         ));
     }
 
@@ -342,9 +342,9 @@ impl PdfLayerReference {
     /// However, the function itself is valid and _will work_
     /// with builtin fonts.
     #[inline]
-    pub fn set_word_spacing(&self, spacing: i64) {
+    pub fn set_word_spacing(&self, spacing: f64) {
         self.internal_add_operation(Operation::new("Tw",
-            vec![lopdf::Object::Integer(spacing)]
+            vec![lopdf::Object::Real(spacing)]
         ));
     }
 
@@ -353,9 +353,9 @@ impl PdfLayerReference {
     /// 50 will reduce the width of the written text by half,
     /// but stretch the text
     #[inline]
-    pub fn set_text_scaling(&self, scaling: i64) {
+    pub fn set_text_scaling(&self, scaling: f64) {
         self.internal_add_operation(Operation::new("Tz",
-            vec![lopdf::Object::Integer(scaling)]
+            vec![lopdf::Object::Real(scaling)]
         ));
     }
 
@@ -365,9 +365,9 @@ impl PdfLayerReference {
     /// number, for subscript, use a negative number. This does not
     /// change the size of the font
     #[inline]
-    pub fn set_line_offset(&self, offset: i64) {
+    pub fn set_line_offset(&self, offset: f64) {
         self.internal_add_operation(Operation::new("Ts",
-            vec![lopdf::Object::Integer(offset)]
+            vec![lopdf::Object::Real(offset)]
         ));
     }
 
@@ -515,7 +515,7 @@ impl PdfLayerReference {
     ///
     /// [Windows-1252]: https://en.wikipedia.org/wiki/Windows-1252
     #[inline]
-    pub fn use_text<S>(&self, text: S, font_size: i64,
+    pub fn use_text<S>(&self, text: S, font_size: f64,
                        x: Mm, y: Mm, font: &IndirectFontRef)
     -> () where S: Into<String>
     {